Haven’t had cold feet, down to the mid-teens, since I bought some 800 gram Danners. I walk about as far as you or a bit farther, and my feet don't seem to sweat, maybe the Goretex lets the moisture out. Since some of my time gets spent in treestands, the various over-boot ideas might get dicey going in and out. The foam pad would help stop the heat loss from the metal platform and stop the squeaking too; good idea.
My Danners are pretty big, so don’t ever get too tight. One medium wool sock works down to about 30, after that I go heavy. I need to look at the blankets to see if I can find a light pair that will go over my giant feet.
