RE: How cold is too cold?
I tend to get cold at times as well. And man it can effect your hunting. regardless I stay out.
I have found that If I stay warm in the cabin through out the night and when I get up, I'm warm, then I start putting on my first layers to maintain my body temp. By the time I do get into the woods I am very warm and this will help for a while or at least until dawn.
It's the wind that gets to you, ware clothing that will help or eliminate the wind from getting to your skin.
KEEP HUNTING THE GREAT OUTDOORS & GOD ALIVE, PASS IT ON!