It was a tent camp.
The entrance to the vast grounds is gated and secure. Fortunately or unfortunately, the days were over 100 F, but we enjoyed the evening breezes and a bonfire with our kids. If you run out of anything, there is a "Dollar General" about a 5-minute drive away. We also went to Englebright Lake, Scotts Flat Lake, and South Yuba River State Park to escape the heat.
I would recommend this campground to everyone for the variety of places you can go and play.
The only important thing I forgot was the generator, but I brought a lot of water, so it wasn't a big problem.
Hopefully, by the next time we come back, there will be a place to play with mountain bikes.
Thanks, Tyler!