I'm not a snow person (I hate the dreaded white stuff), but I would at least keep the exhaust pipe clear, so I could run the engine from time to time, and at least one door clear for exiting. Probably on the lee side of the vehicle, but I'm not sure about the drift thing (did I mention that I am not a snow person???) And the top might be nice, assuming that it is not white, so that chopper can see it...