I read the posts for you previous question as well. My experience is like the catskill guy, you're feet are going to get cold if you sit a stand (how's that for an oxymoron) in cold enough weather. I wear polypro liners, wool outers, and 800 thinsulate boots, but at temps under about 15 degrees my feet still get cold.

I bought those funky looking boot blankets out of Cabela's last year, and they do help. I sat two all day stands at subzero temps last fall and survived it. The key with those things is to put them on the second you stop moving, don't wait for your feet to start feeling cold.