you may finding a live aboard in that area tough to find, last fall when I was looking for a job at PAX, I found only two marinas, one on St Marys and the other in Solomon's who would allow LOB. St Marys was shallow for my boat, and there was a waiting list at the one at Solomon's and the LOB fees were pretty steep.
I did not get the job there, so keep my boat across the Potomac in VA...you may want to look there, as many allow LOB and it is not too much longer of a sail than to drive "around".
PS if you are ex military you may be able to dock at the PAX rec marina...they have a pretty nice set up, exclusive for Military, though.
All the best and welcome to the right coast.