We stayed there and loved the serenity and the pronghorns. A little crowded but the rec area across the street was great.
This website has Warren Bridge, and Warren Bridge Campground listed with the same location on map. I believe the Warren Bridge Campground refers to the paid camping with hookups. Warren Bridge also has 12 sites along the west side of the Green River, some are multi space sites, which I believe this listing is referring to. No hookups, no fee, first come first serve. No drinking water and no sanitary dump, they are at the paid campground. The sanitary dump at the paid campground is available for a small fee.
We have camped here several times. The bathrooms are very clean, fishing is outstanding. If this is your first visit and you are hauling a RV examine the entry for site 10, it is very rough. Sites 1 & 2 are small.