We realized a few things while camping in the snow with a teardrop trailer:
1. It was wonderfully warm at night with just a some fleece sheets, a feather comforter and our 12 volt electric blanket from Roadpro. It also helps to have a warm partner. :-)
2. Beware of any door locks, galley locks or hitch locks that could freeze when the temperature drops. We had an issue getting our key into the hitch lock the next morning. Use an ice prevention spray or lubricate the locks with Vaseline or grease.
3. Dress in layers and don't worry about sleeping in your clothes. It was actually warmer not to change from day clothes into pajamas, so we just slept in our daytime thermals.
4. Keep your shoes where you can jump right into them. I kept my winter boots under the trailer so I could grab them and put them on right away without having to keep the door to the trailer open and let out any residual heat.
5. Keeping water in a tank or bottles from freezing is challenging. Don't fill up your water tank before heading out and keep drinking water in the bed with you to keep it from icing up.
We were not allowed to have a campfire at this particular campground, but I see teardrop camping trips in the snow in our future with a campfire and some simple cooking in our future. It was so beautiful waking up in the morning to near silence with just the hooting of a few owls in the trees.