Convenient to DC and public transportation

This is an urban oasis.  Traffic can be heard but not seen.  Weekdays are pretty quiet in this campground. Living nearby but storing my popup camper elsewhere, I often park my camper here for a few days while I pack it for a trip.  It's also just nice to experience that "getaway" feeling without being too far from home.  Rangers keep a close eye on things, and there are monthly programs at the campfire circle that I sometimes attend even when not camping here.  No electric or hook ups.  There is a dump station and water available at spickets throughout the campground.  Showers and bathrooms are basic and clean.   Oh, and bonus, the American Discovery Trail (ADT) passes through the park.  https://discoverytrail.org/