We stayed here on the Friday night of Labor day weekend 2019 in a tent on our way west. Nice area with plenty of places scattered out so you don't have to be close to others. Only one other person staying in the area that night. And completely free!!
For a free campsite this is top notch. There are two bathroom facilities and dumpsters (very clean camp sites). There are multiple places to camp around the reservoir each with a shelter built. Easy to access of the interstate. Has phone service too!
Easy to find / get to. Large spots with picnic tables and coverings. Dirt road in and large spaces once you get there. Big enough for RVs. When I went it was completely empty and very peaceful.