Oh, Baby, It's Cold Outside...
This is a new one for me. Putting shrink wrap on the screen door to keep the cold out and the heat in.
It's on the Roads Less Traveled (https://roadslesstraveled.us/how-to-stay-warm-in-an-rv-survival-tips-for-winter-rving/) blog. Scroll down to tip #6
We tend to avoid winter camping, but sometimes it happens.
I like the baking idea also.
Great blog.