The coldest we ever camped in was 15 degrees. We didn't suffer but, the water hose froze solid till the sun had been out for a couple of hours. You're heat will run a lot and take a couple of electric space heaters as a backup. As for towing in the snow and slick roads. I would try to avoid that like the plague. I would do it of I had too but, I would go slow and avoid situations requiring hard stopping.
I have been the brunt of many a condescending comment over the years on this forum. I think it's a lack of ice cream.
