When I was little I rode in the old camp trailer we had a few miles down to the main highway before I got in the truck. I wouldn't let my kids do it in our bumper pull today.
When I was in my teens I rode in the living quarters of a gooseneck horse trailer for about 400mi. It wasn't bad at all. The aluminum structure, no awning, made for a decently quiet and comfortable ride. I would let my kids ride in my parents current gooseneck horse trailer.