It says on a sign reservation only, but after driving around to the other spots in red bluff, and feeling great unease, I went ahead and drive in to a spot around 9pm. I immediately felt much better and more safe here. Had a great sleep and was on my way in the AM. I never interacted with the site host but it looks like the trails and areas around are worth hiking.
It was a not-too-treacherous trek. Nice secluded area with pretty views and you can hear the river nearby. Lots of cows!
Edit: I ended up sticking around to take in the place bc I had paid so much. If staying to use the amenities it is pretty worth it, still a tad pricey though 😉 but the hosts are friendly and it sounds like you can use a $8 day pass if desired.
Was a bit pricey for me as I was just car camping, was $38.50 just to sleep but I imagine if you’re going to utilize the area for fishing or hanging out it would be worth it. Permanent dwellings on the property so feels safe. Lovely to wake up near the water and there were lots of deer roaming around.