Thanks to those who commented on my earlier post. The walk in sites are a very easy walk from the car - not any further than you would walk to the toilet at any campground. In fact, I walked past the car on the way to the toilet. AND... free, hot showers. This was a very pleasant surprise.
There was plenty of hiking with trailheads in the park - maybe 2 miles to the AT. The trails leaving from the park are easy to find but aren't so well marked - several of us missed the turnoff to Blood Mountain so you've got to pay attention during those 2 miles.
They had entertainment at the pavilion both weekend nights if you were so inclined.
While the sites aren't 100% private, I didn't feel that my neighbors were close enough to be uncomfortable.
There aren't any bear boxes or cables but I decided if a bear came into camp it would be like the old joke about outrunning the bear - I only have to outrun you, not the bear.
All in all a pleasant spot from which to do many miles of day hiking.