Ben wrote: you don't need a fire to stay warm or cook.
being a young city-dweller I don't know too much about camping. How can one stay warm or cook without a fire?
The article stated that he stole propane tanks and cooked with it.
Also, there are sleeping bags rated to -30F. I have slept in such bags at near those temperatures and they do manage to keep you warm. Although, you have to cover your face or your breath will freeze on your face. I suspect during the coldest winter days he probably didn't leave his sleeping bag for very long.
"Of all tyrannies, a tyranny exercised for the good of its victims may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end, for they do so with the approval of their own conscience." -- C. S. Lewis