I stayed there in a motor home so I can't speak fro m 5th wheel experience. Howeverl, I did see some there and they do have spot for a 5th wheels, but let them konw what you have when making reservations. It is an expensive park, but close to WDC and the train service. The is a national park near Bull Run on the other side of WDC that is nice as well and much less expensive.