Replying to Ski bumming for spring break

i go to school at the university of montana, and for my spring break a couple of buddies and i were thinking about driving to big sky, jackson, targee, and slc. the plan is to spend as little amount of money as possible. by this i mean buying tickets, but camping in the parking lot. it might sound like a pipe dream, but i think we can make it work. the question i have for all of you is hows the snow and do people get piss if you camp in the parking lot?