Good campgrounds Washington DC area

Access to METRO is Cherry Hill's strong point. I haven't camped there, but have lived in the DC area for 40+ years. Cherry Hill has a bus stop that takes you to the METRO station, no need to drive and pay for parking at the station. They also do an orientation and are geared up to serve DC tourists. There are some nice county parks on the Virginia side, but you'd mostly have to drive to the METRO station, and that means an early start since parking fills up with commuters Monday - Friday. If you're going for a few days of Museums & Monuments on the Mall, you'll appreciate the convenience of Cherry Hill even if there are less expensive options.