During more than 50 years of boating on Chesapeake Bay I've only been aground once, which was for about 10 seconds in the Havre de Grace channel while trying to keep out of the way of an oncoming tug pushing a barge. I eased about 10 feet out of the channel and hit the mud, softly. I quickly sheeted out the sails, fired up the A4, put it in reverse and as the barge wake lifted the boat I was able to power off.
My real challenge will be in October when I head south down the ICW. I've been told that if I don't run aground there I'm either very lucky, or lying about the trip.