28,701 campgrounds
Death Valley National Park
Everglades National Park
Olympic National Park
Isle Royale National Park
Rocky Mountain National Park
Grand Canyon National Park
Grand Teton National Park
Great Smoky Mountains National Park
Big Bend National Park
North Cascades National Park
Yosemite National Park
Kings Canyon National Park
Great Basin National Park
Canyonlands National Park
White Sands National Park
