WCollins,
I heartily agree with Sycamore's suggestion about hangarage - I would think it is essential.
I have no experience of flying in very cold conditions - however, I remember living in Canada in the wintertime and experiencing temperatures of 72 degrees below freezing point (-40 F).
Nobody left their cars out overnight if they wanted to use them before springtime! You had to garage your car to prevent the engine from freezing solid (OK, that was water cooling, but I guess there are other fluids that will freeze, pipes / hoses that will become brittle etc). Even in the garage it was essential to heat the engine overnight with some form of electric heater (unless the garage is heated) to allow the engine to be started at all.
I guess the same applies to aircraft engines.
BTW, I would carry skis or snowshoes as part of the survival kit, as walking in deep snow anywhere away from "the beaten track" is virtually impossible!
Good Luck
SD