Same re:cold feet, plus way to many days of ice fishing where they went numb. Took me a long time to figure out the whole "if you're gonna be dumb, you gotta be tough" saying didn't mean I had to be tough.
Anyway, 6-800 g. for hiking. 1000 for still hunting. Cabelas Trans Alaskas for stand hunting or ice fishing, but I carry these in to prevent sweat.
tips: Spray on unscented anti-perspirant for your feet before you go, and give it time to dry before putting your socks on.
Icebreaker socks. Worth it. Best out there, and I've used them all.
Carry two pairs of socks. As soon as you stop hiking, sit still for 5 minutes then change socks, using the old ones to dry your feet before putting the new ones on.