Replying to Road Trip Wisco

So im the oldest out of my friends, and turned 16 and everyone else being 15...anyways. We all got a season pass to wilmot, and its going to get boring. So we want to plan a long weekend road trip. Go all the way up to granite peak for 1 day, peal at night. Go to tyrol for a day, then prob somewhere else maybe cascade or devils head. I know its hard since were all not 18, but is there any way if a parent calls we can get a room or is it that bad to sleep in a car?