There are also products made for scuba diving/snorkeling that are excellent in keeping the mask free of fog. They're inexpensive, maybe something like that would work. I've used the following Sea Gold Anti-Fog and it works well: http://www.scuba.com/scuba-gear-54/028053/McNett-Sea-Gold-Anti-Fog.html
The trick in using this gel is to apply a good layer, then quickly rinse with fresh water, and it leaves a crystal clear film that does not fog.
Also, in a pinch, I've been told that you can simply spit in your mask, rub it around and that will keep it from fogging. Divers swear by that, but I have not tried. Maybe spit on your cam & let us know how it works?
In the winter months, when the tempurature drops well below freezing, it gets harder to stay warm enough to be comfortable. Yes, wool socks are better than cotton but; battery powered heated socks are even better. And yet our feet end up cold at some point anyways. When we are hunting we are usally trying to be as still as possible, for as long as possible. The problem is, when we aren't moving, our blood circulation slows down. We especially lose...