i dont know how many have tried this but, i imagine there are some who havent. when its cold out or going to get cold, i take a military sleeping bag with me. once i get in the stand or the blind i get in the sleeping bag to stay warm, boots and all. dont zip it all the way up or youll have a hard time getting out without spooking the deer. i usually zip it to my waist and stop there. you can wrap it around you if its really cold. also dont put your scope in the bag with you or it will fog up when you bring it out. you also want to keep it scent free. i usually hang it outside. sometimes i wash it in scent-a-way. hope this helps you cold whether hunters.
happy huntin