To me, the trick to master for winter camping comes from one of my favorite movies, Jeremiah Johnson. Build a good fire then spread coals under your bedding. Getting the right amount, priceless.
Grew up in Glens Falls. When I was in the scouts, good old Troop 4, we would winter camp at Salmon Pond. This was a hunting camp deep in the woods. Barracks style bunkroom that was #@$%& cold. Since we never settled down and went to sleep, we would ALL have to go on trail busting hikes without any lights or snow shoes in the middle of the night to burn off that excess energy. This happened every time. I miss that!