I did most of my boating in the potomac (Port Tobacco or Ft
Washington) and my family is from the St Georges Island area so I
spent a lot of time in the south bay and river down there in big boats
but I do remember getting the crap knocked out of me the few times I
tried to take a 16' boat out of Deale.
Once you leave the harbor at Deale, you're in a very large bay of
incredibly shallow water, and that bay is heavily populated by boats
going in all directions. So, in addition to the usual wave activities
caused by nature, you have about a kazillion boat wakes churning things
up. Makes for interesting times in small boats.