d1e59c9a_w_about_Campground_Memberships__Public_Camping
[Private Membership Camping] Safer Environment. Generally campers in a private resort are people like you, they look out for one another, similar to a neighborhood watch. You often run into the same people at other resorts. [1] Park Security [Public Camping] 
Some parks have security, but most do not. There have been several nationwide articles telling the dangers of public campgrounds, including a feature in Time magazine describing the violence encountered by park rangers.
Why Buy a Camping Membership   Everything you should Know about Campground Memberships
Public Camping