I think there are, I just don't know the details. didn't Greg go on one recently? The Chesapeake Bay organization that Dennis gave the link for would be the place to start. Keep checking the Lighthouse Friends events also. Since you have 10 days you might want to take the Lewes ferry to Cape May. You would see Harbor of Refuge, Delaware Breakwater and Cape May. Its not far from the eastern shore of Maryland. Sometimes there are trips inside those lights also.