Lots of great hints here! Another thing about this time of year is simply climatizing (getting use to the cold). I know for me come December, after spending everyday in November perched in a tree, I can handle the cold much better than my peers who don't hunt.
I dress quite light this time of year just so I can get used to the temperature, as I know that it's going to get MUCH colder. When the end of Nov. comes and it's -40, I too will be bundled up like the state puff marshmallow man....but until then I like the ability to shoot more than 10 yards! Best of luck staying warm!