The following morning, Rarity woke up in wet shorts. Rainbow was still asleep, so Rarity put her hand in warm water. She heard a soft hissing noise from under the covers, and Rainbow let out a sigh of relief, still sleeping. Rarity climbed back into bed with her until she woke up. Rainbow felt her wet shorts and chuckled. She wasn't concerned that she'd start wetting the bed uncontrollably - it only happened when Rarity was with her, and even if it started happening all the time, she could always deal with it the same way Rarity did.

After their usual bath, Rarity made two short, tight pairs of denim shortalls. She stripped out of her pajamas, revealing her pink bra and panties, and put one of the shortalls on along with a light blue T-shirt. "How do I look?" Rarity asked, turning around so Rainbow could see her butt.

"You look awesome, Rares," said Rainbow Dash. "And so does your butt." Rainbow slapped Rarity's butt playfully.

Rarity giggled. "Thank you, Dashie. Now try yours on."

Rainbow stripped to her white boyshort panties and matching bra, and put on her shortalls, with a white T-shirt underneath. She turned around to give Rarity a view of her butt.

"You look dashing in those," said Rarity, slapping Rainbow's butt, which made her fart, much to their amusement.

They packed lots of soda and water for their trip, as well as lots of food that would make them fart. They each drank a big coffee and a few cans of soda with fart powder in it.

"Here's an idea," said Rarity. "How about I stitch the buckles on our shortalls shut so we couldn't remove them even if we wanted to?"

"That sounds fun," said Rainbow. "We'd have to cut them when we get back, though."

"I can make more easily. And I'm certain they'll be damaged beyond repair before they even get near a pair of scissors." She giggled.

So Rarity stitched the buckles on both their shortalls. They tried removing them afterwards, but were unable to.

"Perfect," said Rarity. "You ready to go?"

"Hay yeah!" said Rainbow Dash.

They put garbage bags on their seats, with towels over top. Rainbow Dash climbed into the driver's seat of the car, Rarity into the passenger's seat beside her, and they began driving.

They had only been on the road for five minutes when Rarity let out a loud fart. FFFFFFFRRRRRRT!

Rainbow laughed, then lifted her left leg and let out an equally loud fart.

They farted for about an hour, stinking up their shortalls and the inside of the car. They left the windows closed - they did not mind the fart smell in the slightest.

"We'd have to wash them for hours to get the fart smell out," said Rainbow. BBBRRRRRAAAAAAP!

"Oh, by the time we get back from the campsite, they'll smell far worse," said Rarity. PPPPFFFFFT!

"Ooh... I have to go to the bathroom."

"So do I." Rarity crossed her legs.

"I'm gonna see how long I can hold it."

"Then I will as well."

They fidgeted for a half hour, before they hit a traffic jam.

"Can you hurry it up?" said Rainbow Dash. "I have to pee!" But for once she was enjoying being in a traffic jam. So she kept the windows shut when she said this and didn't honk her horn.

"This is rather urgent," said Rarity. "If we don't get moving soon, I'm going to have an accident in my new shortalls!" She fidgeted, also taking pleasure in her desperate scenario.

Rainbow Dash and Rarity fidgeted as they waited, accidentally farting several times.

About a half hour later, Rarity leaked a little and whimpered.

Rainbow saw the small damp spot on Rarity's shortalls, and also leaked. "I just peed a little..."

They kept squirming in their seats for another ten minutes, and then, Rarity reached her limit.

"Rainbow Dash... I can't... I can't hold it... it's coming out..."

*Sssssssssss*

"Ahhhhhh..."

Rarity stopped moving and sighed in relief as she peed in her stinky shortalls. Her crotch rapidly darkened and she felt the warm wetness spread through her butt. The relief and the warm wetness felt wonderful.

Rainbow stared at the glistening crotch of Rarity's shortalls, while hearing the sound of pee spraying denim. This was too much for her overflowing bladder, and she just lost control. Rainbow wet her shortalls, sighing of relief as her stream grew stronger and her crotch and butt became soaked.

"Did someone have an accident in her shortalls?" Rarity said.

"Maybe?" said Rainbow, feigning embarrassment. "You're peeing, too."

Rarity giggled.

Five minutes later, traffic was moving again.

"I wonder what that was all about," said Rarity.

"Probably the Omorashi Illuminati again, trying to make people wet themselves," said Rainbow Dash.

"Too bad we're planning on using our shortalls as a toilet for the entire week," said Rarity. "I just hope no one else found it too distressing."

"If Fluttershy can get over a pee accident, anyone can."

They continued the drive in their wet shortalls. While in another car, Pinkie was giggling in soaking wet jean shorts.

...

They reached camp and set up their tent. They drank lots of water and soda, having brought more than enough to last them the week. They also ate beans for lunch, so soon they were farting again.

"Ooh... I have to go to the bathroom," said Rarity. She ran to the outhouse. She tried to get her shortalls down, but they wouldn't come undone. Rarity desperately tried to remove them. She knew it was pointless, but she wanted to play out not being able to get undressed in time.

Rainbow also needed to pee. Having picked up on what Rarity was doing, she walked behind a bush and tried to remove her own shortalls. As with Rarity, they stayed firmly in place. Rainbow frantically tried to get them undone, enjoying every second of it.

Pretty soon, Rarity started peeing, so she sat on the toilet and sighed in relief as she emptied her bladder in her shortalls. Soon her stream passed through them and splashed into the toilet.

Only a few seconds into Rarity's "accident", Rainbow started peeing uncontrollably. She just stood there and let the pee soak her shortalls and flow down her legs, sighing of relief.

When they finished peeing, Rarity exited the outhouse and walked up to Rainbow Dash. "I didn't make it," she said, pretending to be sheepish.

"Me neither," said Rainbow Dash.

"You need a spanking."

"So do you."

Rarity put Rainbow over her knee and spanked her. Her butt was still damp with pee. After Rarity was done, they swapped positions, and Rainbow spanked Rarity. Her butt was dripping wet after peeing in sitting position again.

After that they started having more fun, and whenever they needed to pee, they went in their shorts. Sometimes they'd tickle each other into wetting themselves. And they always ate food that made them fart.

...

Waking up on Day 2, Rarity wet her sleeping bag. Rainbow was still fast asleep. Rarity put on a werewolf mask and startled Rainbow Dash with a howl.

"Aaah!" Rainbow jolted awake and peed in her damp shortalls. She chuckled, over which the hissing sound of her stream was still audible. "Good one, Rarity!"

Later that afternoon, Rainbow and Rarity's farts grew wetter and stinkier.

"Ooh... I might have a bad case of diarrhea," said Rarity. BBBRRRRRT!

"Me too," said Rainbow Dash. FFFFFRRRRRT!

Rarity farted again and released a bit of diarrhea into her shortalls. "I think I just went a little."

Rainbow Dash farted. PLORP! "So did I."

Rarity let out a few more wet farts, and the third released a little more diarrhea. "My underwear's really dirty right now."

Rainbow Dash let out a sloppy wet fart. "Ooh... Mine's probably dirtier." She chuckled.

Finally, Rarity couldn't hold it anymore. She bent over and filled her shortalls with explosive diarrhea. She sighed in relief. Some of the diarrhea leaked out of the leg holes and ran down her legs.

"Nice one, Rarity," said Rainbow Dash. She lay on her back with her legs raised, farting again. "Put your butt right above my head."

Rarity squatted down so her butt was right above Rainbow's head. Rainbow loved the sight of the brown bulge on the seat of Rarity's shortalls. It smelled absolutely foul, but she breathed in deeply through her nose.

PPPPPPPBBBBBLLLLLLLRRRRROOOORRRRPP!

Rainbow released explosive diarrhea into her shortalls, sighing of relief. Rarity giggled and sat on Rainbow's face. Rainbow loved this just as much as when Rarity's unitard was soiled with hyperscat. Rarity let out a sloppy wet fart, soiling her shortalls further. Rainbow was so excited she also pooped herself a little more, and she peed again.

About a minute later, Rarity peed herself all over Rainbow's head. Rainbow loved every second of it.

Eventually they got up and sat down, wiggling their butts around in their mess, enjoying the squishy feeling under them.

...

In the night between Days 3 and 4, Rarity and Rainbow Dash woke up to the sound of thunder just outside of their tent.

"Hey Rarity, you awake?" Rainbow asked.

"I couldn't possibly sleep through that," said Rarity.

"Ooh... I really have to pee!"

"Me too."

They held it, fidgeting in their sleeping bags, which were right next to each other. The poop in their shortalls squished under their butts. This made it even more fun to hold it. Right now they were two girls desperate to pee in a thunderstorm, unable to go outside and use the outhouse.

Then there was a loud crash of thunder. Rarity and Rainbow Dash were both startled, and with a yelp, they peed full force in their wet, soiled, smelly shortalls. They sighed in relief and giggled.

...

They woke up the next morning. They had drank a lot last night so they needed to pee again. After peeing their shortalls, they got out of their sleeping bags and walked around camp for a bit, until they saw a big muddy area.

"What do you think, Rarity?" Rainbow Dash asked. "Feel like getting a little dirty?"

Rarity farted and messed her shortalls in response.

Rainbow threw Rarity butt-first into the mud, then belly flopped into the mud, splashing Rarity. Rarity splashed Rainbow Dash back. They mud wrestled for a bit, and soon Rainbow Dash was sitting on Rarity's butt. Rainbow pooped her shortalls with hyperscat, and Rarity giggled at the feeling of this.

...

They stood in the rain the following day to rinse the mud off them. But it barely washed away any of the smell on them.

They had lots of fun on their trip. They farted a lot and whenever they needed to pee or poop they just went in their shortalls.

Finally, after a week of camping and using their shortalls as a toilet, they returned to Rarity's house. They hadn't washed aside from standing in rain, so they smelled really bad. Even if they hadn't been wetting and messing themselves repeatedly, there would still be a stench of body odor. But as it was, they smelled of farts, pee, poop, and body odor.

First they rinsed themselves in the shower and flushed the poop out, which was mushed up from sitting on it on the way back. Then they filled the tub with warm soapy water and washed each other. Even though they knew they'd be throwing these shortalls out they spent minutes scrubbing each other's butts. They both enjoyed being on either end of it.

Finally, they were clean and soaking wet, aside from some stains on their butts. Rarity got some scissors and cut off the straps on their shortalls, and they peeled them off. They took turns looking at each other's panties. They were heavily stained at the butt, and Rainbow's white boyshort panties were dyed yellow where they weren't brown. They left them on as they put on their outfits from a week ago.

They had really enjoyed this camping trip and couldn't wait to do it again next week off.