No doggie door will be needed as you will need to be outside fastened to one end of a leash whenever your dog is outside. Also, please walk your dog to give it exercise. We see so many that are never walked and when they are let out the owner just stands by the rv. Dogs do not like to do their business in the same area where they may want to lay down. Our dog is well behaved and is on her leash. When we sit outside she lays beside our chair and enjoys sun or shade and being with us. She also enjoys her walks as she gets to see different things and interact with other people and animals at times. It enriches their lives and it will yours too.