I'm going to be wintering in Colorado for at least a couple years, but I come from a much warmer climate, so I don't completely know what to plan for. I do not have my vehicle picked out yet. What ideas do you guys have for makeshift insulation if I were to get a large SUV? Could you conceivably be comfortable layering some fleece throws on the walls and bundling up? Also, how difficult would it be to insulate a pop-up camper? It seems absurdly difficult for what I need, but maybe someone can suggest something.