I am sure ours bark if someone walks by the camper. Most of the time they are walking a dog too! We try to take our 3 with us if it is an all day outting. In the summer I will not leave them in case the power goes out, it can really hot in a camper. For short trips to the store or eat out they stay behind and I will take them for a walk before we head out. Barking will happen no matter how trained the dog is, what I do not like are dogs not tied up at the campground private, COE or state owned.
Sharon