EdT nailed it.
I spent a week in a tent on Mount Fairweather. If you know Mount Fairweather, you know there is nothing fair about the weather there. We had a guy basically use Cumminscowboys approach. I will say this he made it out, but I promise you he learned a lesson he would never repeat again. Personally I can't sleep in clothes, I keep them in my bag with me to keep them warm. When I get dressed in the morning I am warm and ready to go.
