For years I have carried survival gear thinking I could survive if I got in trouble and when it did happen or tried to use my gear, I found I had nothing but useless gear. I read books on survival and went to every class I could find. When it came to the real world (surviving in Alaska) the books and classes only told how you could survive under the best of conditions not the worst. I read about how to build a Quin-ee or snow cave and one man shelter. It was not until I built one and realized what the books did not tell you. If you did not know what you were doing the building of a snow shelter could cause you to loose a finger or two from frost bite and that was the good news.
Being able to make and keep a fire going in the winter is extremely important, have any of you ever looked around when you were out snowmobiling and did you see any wood to burn? Have you ever tried to start a fire in the winter? I dare you to do it!
Have you ever done any winter camping? If you have you know there is a learning cure that you go through to determine how to keep warm and that all the gear you can carry. In a survival situation you have nothing.