Big big groups!
Camped here summer of 2014 and 2015 for a football camping trip. I did not arrange the reservation but assume they can accommodate very large groups. We had easily over 40 in attendance. Not a huge amount of amenities at our site but no major problems arose from this.
The state park nearby has a wonderful beach and a huge dune! We made a competition on how fast we could each climb to the top. It must have been a sight watching 40+ football players run down the dune.
Our open space, rustic campsite was perfect and had the ability to create a fire large enough for the whole team with their large rings!