We stayed in the D loop at site D37. All of the sites in the D loop are more spaced out and wooded than in the other loops. They also don't have electric and the bathroom is a vault toilet.
Site D37 was able to fit our two tents comfortably but I don't think there was a flat space to fit a third. It was also pretty overgrown and unkept. So bring lots of bug spray. Site D39 is pretty close and it would work well for a group needing multiple spots. We had a view of the lake across the road. The bathroom was a several minute walk.
Site D37 across from us had water access and looked really nice. Other nearby spots D40 was also quite heavily wooded and didn't look like it had much more than one semi-flat spot for a tent. But it was definitely very private!
We used the shower houses(which we had to drive to get to) and they were okay. The water wouldn't get hot, but we didn't take ice cold showers. The swim beach was the highlight of this location and very nice!