Great response Riley, good someone spoke up for we "country folk." Dogs, esp Labs, love to ride in the back of a PU, and what kind of person would chain one on?
I love my dogs like I love my kids and grandkids, ....., but the dogs are farther advanced than kids in this area. In fact, a dog riding in the back of a truck would never let a kid riding there with him do anything foolish; dogs are very protective of our young.
As to riding in the fifth wheeler down the road, most likely, the dog will just find a confortable place to rest and sleep mostly the whole way. Make that place confortable and permanent for him and he will know it's his place. Doubt he'll ever complain.
PS--"he" as referenced to the dog, can be "she" as well.