sleeping in your car is fun! I've done it most at hotel parking lots. Works best if everyone has a very warm sleeping bag and you are in an SUV. Just have some gas so you can start the car every couple hours to heat the car warm. All depends on how well you sleep when you aren't in a bed, I can sleep anywhere, but everyone is different.. As far as being worried about the ski resort kicking you out, if they tell you to move, move! Go find a different place to park, shouldn't be that hard.