I would like to have a warmer TC floor... any ideas?

Being old I get cold feet too. In the TC, when hunting and even around the house (we have an unheated crawl under half and a dug basement under the other half) and I've found that wearing arctic boot liners around the house work well and in the TC and hunting, I use the electric socks in my hunting boots. Happiness is warm feet and a sock hat on my head too. Not much hair left for insulation....