The look Melanie Roach gives you when she finds the empty Funyuns bag under your pillow.
Pee Buddy: Depending on if you want to get frostbite on your junk or not when you whip it out to pee, consider a pee buddy. Yes. A bag that you will pee into and empty later.
Water Purifier: Since all your neighbors' stank will be floating in the water, you'll want to use a purification system before you take a swig. Get a small and compact one, as well as some empty jugs to put the water in.