You have time to catch a few hours on the beach on Saturday morning if you want. You can access the beaches in Ocean City, Fenwick, or Fenwick Island State Park. Ocean City also has the boardwalk with lots of cute shops.
Some of our favorites:
Uber Bagels is our favorite spot for breakfast. We love Ponzetti's for casual pizza and drinks at the bar. Tequila Mockingbird, Ropewalk, Sunset Grille, and Harborside are great for lunch/dinner. Check out the Crab Bag for a quintessential crab feast. Our first date spot was Harpoon Hanna's, about 10 - 15 minutes away. Fisher's Popcorn is a must if you're visiting from out of town.
We like just being on the beach but if you're interested in other things to do, there's lots of of mini golf, go-karts, water sport rentals, etc. Let us know if you have questions or need specific recommendations.
The White Marlin Open, going on August 4th - 8th, offers the unique opportunity to see dozens of sport fishing yachts head out early in the morning and watch the weigh-ins at Harbour Island (14th St and the Bay). At the end of the day you can check out the boats at Sunset Marina and grab a bite at Sunset Grille. These areas will definitely be busy.