click here

and...

more info

These are some formal campgrounds...in general more primitive than a KOA. Pick one without RV access to cut down on that impact.

Also, all the BLM land in the area is public land and available to camp on (check a good map). I've seen some people camping along side the Potash road, downwind from the tailings pond (not for me )
I've camped along the river, but it was first come first serve back then and it fills up very fast during events.