My Hunter 37C had a four foot draft and I still managed to run aground several times. The truth is that you see plenty of C&C, Beneteau Firsts, Swans, etc. on the Bay with drafts in excess of 6 feet. I am looking at a picture I took of Pirates of the Carribean which sailed right into Annapolis with a 10 foot draft. The truth is that you can get up just about any River off the Bay with 6 feet and under. But to
anchor snug to shore you would probably want a 4 foot draft.