We stayed the weekend at the Pickwick Tailwater campground this spring--this campground might not be what you are looking for (
it's not full service) but we had a spacious site with water & electric. This campground is fairly close (15-20 minutes) to the Shiloh battlefield and even closer to the Pickwick Landing State park (they have a nice buffet meal at the Inn).
We drove through the campground at the Pickwick Landing State park and my wife and I both agreed that we were glad we didn't go there
Hope this helps...