If your luggage is fairly easy to transport by hand: The light rail has a stop at BWI. It's something like $1.60 each way if you ride it to the Camden stop by the conference center. Only a couple blocks from there to hotel.
I'll actually be parking at airport when I drive in and doing this.
(Light rail between Camden and North Ave will be down, but can still get to Camden. Roughly 45 minutes between airport and Camden accounting for station stops if I recall.)