One sort of federal park to look out for is Corp of Engineer (COE) parks, always found on a waterway. Their campgrounds are huge for the most part. Lots of sites take 75 ft units if you have one...heh. But unless you are a boater the parks themselves don't have a lot to offer. Don't think I've ever seen a hiking trail for example. But they make great layover spots on the road for a day or three. They often have water and electric no sewer.
The small size of the other park campgrounds is historical, many were built during the CCC era, the 1930's, when campers mainly were tenters or car campers. And the parks refuse to enlarge the campgrounds or modernize them because of radical environmentalists who control the NPS and the USFS. The idea that a park larger than some eastern states cannot add campsites or modernize the ones they have is idiotic. Tho in YNP they have slightly modernized a few cg that are privately managed.
