I can't comment on marinas...but my guess the reason to visit DC is to see the many great sightseeing spots.
I wonder what will be open even by June.
In case you are not aware, Mt. Vernon has a dock you can use to visit the place. When we went, we had the only boat in the dock.
DC experience?
The Admiral and I are planning a DC trip thus spring. Has anyone stayed in a DC marina for a 2 week stay?
We stayed at the gangplank marina. They have both mooring balls and slips. A bit long in the tooth, but met great people and walking distance to the capitol. In re : mount vernon, docking space is limited and the very boats clearly have the focus.