Welcome Dano to the MOC family.
We were at
Stone Mountain Park spring 2004.
Here's a web page I threw together of the area. Scroll down the page and take a close look at the campsite we were in. As you can see the site was kind of narrow and we could only sit out to the rear of the trailer but the view was worth it. Few of the wooded sites were level and will require some blocking to get level that is if you carry enough blockage. Our neighbors left tires and left front jack were sitting on 4- 2X8's each but he had a terrific view. He had been there before and came in prepared. Ask if you can take a drive through before being given a site.
We would definitely stay there again but we would also take a much closer look at the sites available.