Your training has made you more resourceful than I. Before rolling in the snow, I'll heat some water and sponge bath. The reason I posted the question was because when the temp dipped below my bags rating, I was clammy all night. I have since discovered info that tells me that being dirty and having closed pours could contribute to a clammy sleep. To save time and xtra stuff on my last trip. I deceided to go mountain man and not shave or bath. Not anymore...