We took a ferry from Port Bolivar to Galveston Island; it was free and only about a 20-minute boat ride.
Galveston Island State Park, Galveston, Tx, Dec 2022
The park offers camping on both beach and bay side of Galveston Island. The bay side has only 20 sites in a semi-circle with a communal pavilion in the center. It had lovely views of the bay but feels very isolated. The nearest restrooms were about 200 yards away in the tent sites. There were no shortcuts, so it did feel like a bit of a hike to get there for a shower. We moved over to the beachside for our last night and the bathrooms were much closer. There was no beach view from the RV's, but it was a very short walk to the beach.