27,568 campgrounds
Yosemite National Park
Glacier National Park
Isle Royale National Park
North Cascades National Park
Great Smoky Mountains National Park
Olympic National Park
Denali National Park and Preserve
Grand Canyon National Park
Mount Rainier National Park
Indiana Dunes National Park
New River Gorge National Park and Preserve
Great Basin National Park
Redwood National and State Parks
Rocky Mountain National Park
Wind Cave National Park
