Sites that contain camping information include Hipcamp.org, AccessCamping.com and KOA.com. While Recreation.gov focuses on federal lands, these sites also list state parks and other campsites.
Hipcamp covers camping on regional and Army Corps parks as well as national and state parks. A new feature as of September 2015 is information land sharing, which involves camping on ranches, farms, vineyards and land preserves.
Access Camping lists private campgrounds and Corps of Engineer parks and has information on camping clubs. It contains links to resources such as RV Park Reviews, Trailer Life Directory and Tengo Internet, an outdoor Wi-Fi provider.
Kampgrounds of America lists its campsites and amenities. KOA campsites are in national and state parks and other areas.