I interesting place..
The State Park is Very nice, quiet, well kept. It has showers, very clean modern restrooms and power and water at sites.
You can also camp in the sand in at least one area.
This is a long stretch of hilly sand with vegetation in about 70 percent of the Dunes which give this area it's ambiance and attracts busloads of sightseeing. But the Dunes are not crowded at all.