A great find! Very nice BLM campground right off US 93 between Phoenix and Kingman
A campground on the Natchez Trace Parkway, so you don't even have to exit to get there. Drive past the M Lewis obelisk and up the hill to a really nice, free federal government campground.
Wonderful campground only a few miles off of I-77. Sites with elec+water, elec only, or neither (my favorite!). All reasonably priced, and with Senior Card, downright cheap!
On lovely Williard Bay, the northeastern, freshwater(!) arm of the Great Salt Lake.
Really nice place, good bargain. Quiet and natural, but close to civilization. A Loop is more open, on a point of land in a calm little estuary of the Arkansas River. B Loop is in the forest above the actual river. They have showers.
Expensive for the non-resident, but a nice campground in a spectacular location, on the Chesapeake Bay just a few miles north of where it meets the Atlantic. There is a cool little boardwalk access to the beach, where you can walk along the beach to the boat ramp/picnic area/fishing pier a little south. Really fun place.