You’ll be very close to Crisfield, so Captain’s Galley for crabcakes and other Ches. Bay specialties is an obvious choice. If you have time, you can also take a ferry from Crisfield to Tilghman Island, sort of a "land that time forgot" type of place with a dwindling population of crabbers and other fisherfolk. Follow the procession of people from the ferry dock to Hilda Crockets for a multi-course seafood pigout.
Where are you driving from to get to Deal?