Liveaboard Washington DC
Gangplank would be fun, but unfortunately they have a waiting list right now for liveaboards (not enough infrastructure). And there''s an additional income tax if you live in the District. Metro is great public transport inside the Beltway, but it doesn''t go out as far as Reston, you have to switch to a bus.
Several folks commute from Annapolis to northern VA, if you end up here you could join a carpool. Gerhard is right that the traffic can be a problem. The common wisdom is to leave early, 6 AM.