RV Parks in or around Washington DC

we stayed at Greenbelt last year late September. perfect for our 5 days there. they have water and dump station. only glitch was a tick infestation but we didn't see any, of course we don't have pets with us and we also sprayed around the rv once set up as a precaution. Drove into town by our selves, paid $21 per day to park within a block of trolley tours. we then paid the couple day tour deal for that and saw an awful lot with the hop on and hop off. We enjoyed it but we should have stayed another week. The park is nice just try to camp at the far end where spaces are large. Enjoy your trip. Good Luck & Be Safe ! ! !