If you were ever forced to bug out and survive in the middle of winter, knowing how to stay warm and dry in chilling rain or subfreezing temps is a must. And what if you had to do that without bedding, fire, or a blanket. Would you still be able to stay warm and dry? Since my brother was in town for the Thanksgiving holiday we decided to see how one of my favorite survival shelters — a debris hut — would fare on an overnight in some cold weather. The evening we did the test was going to be in the low 20s (Fahrenheit) so it was a great night to test the …