10 of us camped at group site C for two nights in late August. There was really only room for 6 or so vehicles parked comfortably. Not sure how you'd fit 50 people here. Plenty of table space for our small group though. The riverbed was dry, and the water spigots have all been removed, so bring your own water.
Tent spots were mostly very rocky, which made it really hard to pound stakes in. We managed to fit several hammocks also. The fire pit was full of rocks, which I had to pull out and stack around the edge so we could cook with coals properly.
This campground advertises vault and flush toilets on recreation.gov, but the flush toilets were deadbolted and out of order. Looks like they've been that way for a while. This needs to be updated on the website and I personally think the price should be dropped a bit. The one set of vault toilets is shared by all 3 group sites. Luckily the other two sites were empty the weekend we went. Vault toilets did have TP.
It is a very pretty spot and we enjoyed our stay.