Last year the moorings were already gone a week before the show (right around now). I'm fairly confident that you will not get a mooring on Thursday (the show starts on Thursday), but as said - there are plenty of places to anchor
. Weems Creek, Back Creek (although I've heard that there may be less room than usual there due to Port Annapolis expansion) and by the Naval Academy (though that may be full already too). Of course, this year may be an aberration due to the economy, so you might want to call the Annapolis harbormaster to find out.