Inspired by a conversation Heather and Shinn had a couple of months back, inside of this building Camp reverts to the way it was way back at the start, two years ago. Zombies wander the building and yard outside that're actually a serious threat and will only be stopped for good instead just until they've pulled themselves together by a shotgun blast to the face (if your character's lost, gave away, or never got their shotgun, they can borrow one at the door until they leave again). Any food they bring in will be turned into one of the few safe foods from before the chefs came, and any taken from the small snack room or vending machines that can be found inside will make weird things happen. If you wander too close to the lake (or through the back door, which opens right into it) you'd better be ready to fight for your chastity (ETA: Like I said to Rikuou below, I didn't expect for people actually to get raped, more realizing that Marcy seems to be acting weird and is coming at them really fast, run away!). And if you die, instead of going back to your moogle you'll be turned into a zombie or something.

All of this (including zombieness) will wear off as soon as you leave the building/the yard around it (unless of course you want something to go wrong). And if your character avoids all weird camp stuff inside, they're still get to experience things like funhouse mirrors that distort their image into what they'd look like with various diseases, a photo/video gallery of camp's best or most embarrassing moments (in character favorite old threads post?), and whatever else you can think of.

Feel free to go wild with anything you can think of that I haven't. Your clothes suddenly turning into the camp-issued tracksuit? A series of rooms recreating the plagues with a roomful of chippendale zombies at the end to give you the full experience? Whatever you want.