You can always do the Blade thing:
1) Get a cot to get you off the ground
2) Get foam to put on the cot, it will help you retain heat
3) Get a mummy bag
4) Get a second sleeping bag to put the mummy bag in
5) Get blankets to put over your face in case it is exposed.
6) Wear underarmor
7) Sleep with your clothes for tomorrow in your bag

Make sure you pee BEFORE going to bed.
9) Once you wake up in the morning, contemplate staying in bed until spring.
10) When you do get up, immediately start moving around to generate some heat.
I have slept in 3 degree Fahrenheit weather under the barn using that method. I am nice and warm in my bags, but getting up in the morning sucks.