Sebastian Inlet State Park, FL. (I'm going there this fall on my A1A Atlantic coast road trip, staying in Cocoa Beach, and traveling from Port Canaveral to Vero Beach.) A1A is a designated scenic and historic coastal highway. SR A1A is heavily associated with Florida beach and surf culture, and is known for its lush tropical and subtropical scenery and ocean vistas. In many places, the highway directly fronts the Atlantic Ocean.
FL: Sebastian Inlet State Park in Vero Beach. Located on State Road A1A, 15 miles south of Melbourne Beach. The campground is lovely and many sites have waterfront views of the Sebastian Inlet and Indian River Lagoon, but you sacrifice privacy for the view. Non waterfront sites have more trees surrounding each site. For some local flavor, visit Capt. Hiram's, almost directly across the Indian River Lagoon in Sebastian. There's often live music at the Sand Bar.