Maybe a boring answer, but I am from a far northern tundra, it wouldn't make much of a difference. I'd still take my little brother and make do hunting, fishing, and gathering, spending the cold night around the fire telling stories and playing games, a hard days work in a bowl on my lap and wrapped around us in the form of a nice, warm reindeer parka.
Anyway, that got quite wordy.
Odd one this: What would you do if you knew that tomorrow the planet was going to break apart with you trapped on it?