Miscellaneous Notes on Camping : Page 181
Drying the sleeping bag by hanging it on a branch or rock during the noontime stop, whenever the sun is shining, is the best method of insuring a warm sleeping bag at night. This should be routine, since even moisture that cannot be felt will decrease the warmth of the bag.
An excellent method of having water ready for a hurried breakfast is to dig a hole in the snow, line it with grub bags and just before turning in at night place a full pot of boiling water in this lined hole. Cover pot with more bags and snow for insulation. In extremely cold weather at least a foot of snow cover is needed.
Never leave articles scattered around the snow. They should be either in the tent or in the rucksack. An extra waterproof bag or two is excellent for miscellaneous small articles.