RE: Secret to Keeping Warm
I wear loose fitting Muck boots, the rubber ones that are like 18" high and waterproof and one pair of wool socks and some hand warmers in there, my feet are warm. Put the hand warmers in after you are seated otherwise the sweat will make you freeze. If your socks or boots are too tight or not waterproof you will freeze no matter what you do except maybe donning a sleeping bag which is a great idea. Pick a good hunting spot! I find that when I see more deer I get warmer, on days when there is no wildlife I get much colder much faster.