Mick'nSarah sounds like you had a great trip. I guess the beauty you see on a trip like that outweighs the stupid two legged animals you sometimes come across. Can't wait to see pictures.
We like to use sheets and if needed a electric blanket. We have camped as low as 16 degrees and never kept the blanket on for more than a couple of hours.
We got the Chevy Traverse it was one of the smaller tow vehicles that came with the seven pin plug for trailer brakes and charging the battery but it only came with a class 3 hitch.
In our experience new car shopping we learned that if the towing package does not come from the manufacturer or if it is something the manufacturer says the dealer can install on that type of vehicle they will try to get out of the warranty.