We've secured a block of rooms at The Seaport Hotel, only a two minute walk from the venue. There are no minimums, so if you only want to stay on the night of the wedding, you may do so!
The website URL will bring you directly to the room block.
We don't have a room block here, but this is an excellent inexpensive option across the Lawn on D in the Seaport. The bride and groom have stayed here during a PAXEast convention, and thought it was clean and sufficient. This hotel is about an 18 minute walk from the venue.