We were camped at Potholes State Park a few years ago and down the road about a quarter of a mile there were people camped in what looked like a gravel lot. I looked to see if I could find it on freecampsites.net and there were a number of free places listed right on the lake. Unfortunately none of the places I looked at had any reviews or pictures so I"m not sure which one it was but I'm thinking its the one called Glen Williams. One called Blyth states you need a Discover Pass to stay there. Let us know what you find as I have also been thinking about going to get some sun.