You "Fun Hogs"! I envy you that great environment. But you earned every bit of your success. Obviously you know how to dress for those temps.
But here's a tip from a ski patroller who has taught Army ROTC Cadets winter survival:
-> Instead of heavy wool socks wear thin (3 mm) neoprene diver's sox over thin polyester liner socks. These divers sox are made from closed cell neoprene rubber covered on both sides with permanently bonded knit fabric. US Divers make the best 3 mm divers sox and they are factory seam sealed, saving you the trouble.
-> These neoprene divers' sox will function as Vapor Barrier Liners (VBLs) to keep sweat inside the divers sox and away from your boot insulation, keeping it dry and warm all day (or night). VBL barriers are most often used as socks but sometimes in sub-zero temperatures as sleeping bag liners in the form of coated ripstop bag liners to keep the insulation dry and warm.
I've used divers sox VBLs for over 25 years with felt packs, back country ski boots and even light Gore-Tex hiking boots and gaiters to keep my feet warm.
Yes, at the end of the hunt you need to put the sweaty, skanky poly liner sox in the laundry right away and have fresh ones for the next day, and you need to turn the VBL sox inside-out to dry. But your felt pac liners will be dry. Damp/wet felt pac liners or insulated boots take a long time to dry and lose insulation value during the day as they get wetter by the hour.