Also, a bed roll may not be a bad idea to help insulate you from the ground. Can also be done with leaves, but man a bed roll would be comfortable. I'd also suggest getting some warm winter gloves if you are in a cold climate. Frozen hands won't do you much good and will make your survival infinitely more difficult. I dont know if you watch DDP on nat geo, but a guy was using a big fresnel lens and was burning wood instantaneously with it. Might not be a bad idea for a couple of bucks to pick one up as another way to start a fire