well if you're only going to smoke a bowl or two, it doesn't take that long... just snap the hits and it will be over in no time, smoke in your garage it will be a little warmer.
Car maybe? I live in the tundra during winter as well, and I usually end up throwing on a bunch of layers. I'm not a fan of winter taking unless It's snowing and peaceful.
I hate power smoking, I bundle up and sit in the car with my heater on while i browse GC with out wifi +laptop.