Goose Creek State Park campground is one of the newer state parks in North Carolina. The RV part of the park has a great layout with large sites. The park is very flat with full hookups and a large patio/picnic area. They also have cabins.
We stayed at one of the full hook up RV sites with our Riverside Retro 199FKS and it actually looked small in the site. We had more than enough room.
You are far enough away from Washington, NC that you don't get great cell coverage so, it is almost like going off the grid. I think I had service if I sat outside with my left leg propped up (just kidding).
Since this park is so new, there are not many trees or vegetation to provide privacy between sites. I think this park will be great once the plants grow in - don't skip for this reason - still go, just know that you won't have a lot of privacy.