Did an overnight here with hammocks, and it was pleasant. Know that there's a bit of a walk from the parking lot to the campsites and portable toilets are your closest option unless you take a very brief walk over to the visitor center, where the bathrooms are actually quite nice and open after hours.
One thing to note: I found a big yellow hornet walking on my hammock's rain fly shortly after nightfall. While it left without incident, I imagine in warmer months hornets at the campground could be a very real concern.