Campsites out west too small?

[exav8tr]

The CG inside YNP (Fishing Bridge), will accomodate you and others outside the park, Grizzly Bear for one in West Yellowstone and we stayed at a PA Park about 14 miles from the West entrance. At the Badlands we stayed at Ellsworth AFB. I don't do much Nat'l Park camping due to size and lack of facilities (generally). Don't know about Grand Canyon or Lake Powell.