[quote=dougwalkabout]
Bolded part is most important, have dry wood that is easy to light and then get more fresh wood from forrest. Chainsaw is not a must, a handsaw works too and keeps the user warm while sawing.
Yep, cutting wood by hand warms you twice; once when you work to saw it, and again when you burn it.
Maybe, but you need a lot of wood and you need it in a hurry. That kind of volume means taking larger trees. These folks don't mess around; they know better. Plenty of exercise splitting it.
And remember Les Stroud's advice for extreme cold: "You sweat, you die."