At one time, many years ago, there was a no-wake zone that extended about 100 yards out from the end of the jetties of Sandy Point State Park, and the swim area was buoyed off to depths of about 6 feet. To my knowledge, this no longer exists.
Unfortunately, people tend to totally ignore no wake zones, and unfortunately, ignore the fact that their wake can be deadly to those in small boats, kayaks, jet skis, etc... I see this on a daily basis near the mouth of the Susquehanna River as 50-footers roar past other boats, tossing them around like a cork in a hurricane and not paying any attention to the dangers they impose on others with their careless ignorance. I watched in horror a few months ago as a large trawler roared within just a few feet of 3 youngsters fishing from a small jon-boat near Battery Island. That tiny boat was tossed in the air, then slammed sideways into the shallows as the youngsters held on for dear life. I called the Maryland DNR Police, but they never arrived on the scene. Ironically, the DNR boat was just a mile upriver at the time and could have responded had the dispatcher bothered to call them.
The mooring area in front of Tidewater Marine has 6-MPH buoys positioned 100 feet outside the area, but even at that distance, those boats on moorings are frequently slammed by huge wakes from passing boats. Same is true for the outside fueling dock at Tidewater. I had my rub rail completely destroyed there while fueling up one morning when a big cruiser roared down the channel just 100 yards from the dock. I was able to do some rudimentary repairs, but the cost of replacement would be about $900 for just the parts.
Good luck on getting any no wake zone additions, or enforcement,