Over the years, I traveled with three different dogs at different times who were all crate trained. They could be left behind in the crate outside or uncrated inside the RV without any issues. They would never make a noise unless someone invaded their territory. That means coming inside the RV with no one there or within 6 to 8 feet of their crate if crated. Then there was serious barking and growling which is appropriate. I never had a problem in any campground. To the people complaining about leaving a dog alone in the RV: if the dog is used to be alone at the sticks and brick house, there is no difference leaving the dog alone in the RV.