Ft Clinch on Amelia Island/Fernandina Beach, Fl is nice. It actually has two separate campground loops, with one having only about 12-15 sites with a walk over to the beach.
From Savannah, consider driving south on HW 17. It basically runs parallel to I-95. The town of Midway has a small museum, and and old historic church. Near Darien, consider dining at Mud Cat Charlies for good seafood. In Darien, Skippers also has good food.
In the Brunswick, Ga area, the Jekyll Island campground is good.
Enjoy your trip.
Fred
Fred & Vicki
St. Augustine, Florida