Easily booked a site online for July 5-7 and had a very nice, quiet stay in the park. We chose this park as an alternative to staying on Assateague since it's only about 40 minutes away, and we prefer the shaded forest and lack of crowds. There were only a few other campers in our loop. If it was fully booked, you'd definitely be able to see and hear your neighbors. I thought our site was tucked more in the forest based on the maps, but it was pretty close to the other sites. Good birdwatching from the site!
Definitely some insect pressure at the site. We had a screen which kept us protected, but when outside of the screen to do dishes or anything else, the mosquitoes were around. I would skip the "Trail of Change" during the summer months. We had to frantically jog half of it to escape the insects. I believe the park sprayed for mosquitoes during our stay. We heard what sounded like a spray truck very early in the morning drive around the campground. The other trails are short, easy, and good for gentle hiking or biking. The map could use a little update with trail lengths and other info. The inner trails are not swampy like the Trail of Change, so there was less insect pressure.
The bathhouse with flushing toilets, sinks, and showers (hot water didn't work in the men's shower) were within easy walking distance of the site and were fairly clean.