Before we ever left our dogs alone in the RV, we made sure they were not afraid of it. With the new RV, the first thing I did was put down their dog beds, a couple of favorite toys, and a few treats. Then I sat down on the couch with them on my lap for a bit, giving them time to absorb all the new sights and smells.
Once we felt they were happy with their new digs, we left them alone while we took walks around the campground, or a quick run into Walmart. So far, RV has always been quiet when got back, if we leave them for any length of time, we always put their bark collars on.
For our dogs, the key is to make sure they are happy with both the RV, and campground.
**we travel with a 10 year-old 30 lb. poodle, and a 12 year-old ten pound poodle.