East coast trip heading south

Cherry Hill rv park in College park Maryland is your best option for DC. Expensive but near metro and that saves your gas parking cost and nerves. Traffic in this area is very heavy. I know I lived and worked there for four years. You can spend 3-4 days in the Smithsonian alone. The Wall and Lincoln memorial are not to be missed. Fortunately most of the things to be seen are near each other. Wear comfortable shoes.