It was difficult to find pictures or reviews of the Findlay group sites. It honestly seemed to me that they didn't exist, so I thought I'd do the service of taking some pictures.

The group sites are away from the main campsites, so you should have plenty of space for your group to set up and enough distance between them to not disturb the peace if you have a large group. OGA2 is heavily forested, I'm not sure about OGA1. There are plenty of trees so both hammock and tent campers should be accommodated. The fire pit is large and there are 4 picnic tables.

The campsite is about 75 yards from the parking area, and there is a vault toilet right before the parking area.