I have to agree with PawPaw. My Garmin will list campgrounds, but mixes them with trailer parks and leaves out most state forest service & COE parks. Even with the latest update it lists many closed campgrounds. While I will sometimes try using it, I have much better luck with AllStays Camp & RV, either the app on my iPhone, or the website. That, combined with RVPark Reviews has provided far more useful information. Another favorite app is CampWhere, which lists non commercial campgrounds, however it is no longer available from iTunes. There is a filter on AllStays Camp & RV that lets you search for specific types of campgrounds.