Truck - family of 5 and 65lb dog

Putting a dog or cat in a kennel and putting them in the trailer would not be a bad ride for the animal - where do you think horses ride? Back in the 1980's I rode more than once in the front of a gooseneck horse trailer from Western WA to Boise. Not a bad ride at all. We laid on the bed and even had a small port-a-potty if needed. More recently had a sick horse that we had to haul about 4 hours to the vet. She was trying to lay down so I rode in the trailer for over an hour to try to keep her up. Not talking about the issues with the horse, the ride was not bad at all. You can't tell speed and can't feel most curves. However, you really feel the start and especially the stop. The exhaust brake on our Diesel truck can hit hard on some decelerations and I really felt that. The only issue is heat, but only an issue if a hot day, an open window can solve that. Other than that, if an accident occurs you most certainly will lose the pet. Same problem with horses and people haul them all over the country. I think a horse trailer is built much better than an RV, but they look pretty bad after an accident.