WorldFranchising.com:
Kampgrounds Of America is North America’s largest franchise system of open-to-the public campgrounds; no membership fees or annual dues are required.
All KOA campgrounds offer RV and tent sites; 90% also offer Kamping Kabins. Nearly 2 million copies ofthe KOA directory are printed and distributed to campers. KOA campgrounds are located in 45 of the contiguous United States, 8 Canadian Provinces, Mexico and Japan.
Check the Franchisor Background.