We have a GOOD SAM membership and that has a function that allows us to plan our trips. Campgrounds fall under 3 listings Good Sam Affiliated, Privately Owned, and Public . Most have a rating of overall appeal, restroom, and facility. For most you can find an general description of the CG in question and in many cases reviews of the local.
We travel the I 95 corridor down and have stayed overnight at locations that I can recommend and in 1 case a place I would strongly discourage. We travel from Delaware and pick up 95 south of DC