I have never seen a Class A motorhome that you could not move around in with the slides closed. I would think it's probably some kind of a safety rule that you would have to be able to move around in it. I have seen trailers and 5th wheels that are completely blocked with the slides closed, but never a motorhome. Now it may be a tight fit, but you'll be able to get from the front to the back. My Tropical has three slides. When all are closed you can still easily walk from front to back and use the couch and dinette. You do have to crawl over the bed to get to the closet and the bet butts up against drawers that you can't open when the slide is closed, but other than that you can access everything else in the motorhome.