I wrote a scathing review of this campground on Google, for no other reason than to discourage people from crowding it up and detracting from it's solitude. I'll be a little more generous here.
This campground is at the end of the Navarro River, where hiway 128 meets 1 just north of Point Arena. The only real "service" available here is port-a-potties. There are no hookups of any kind. Each of the 10 or so sites has a picnic table and a fire pit. There are no trees and no wind breaks, so you're kind of exposed. The beach has lots of character, tons of driftwood that people have moved around and made crude huts out of. The river is off to the side and flows out to the ocean, and is great for kayaking.
If you come prepared and have low expectations, this is a great spot. Don't expect to find any spots on weekends during the regular camp season. Off season camping is pretty light.
As a previous reviewer noted, it was closed for a time when heavy rains inundated the road in. It's been open for the last year, and they've even smoothed out the giant potholes that almost swallowed my Honda Fit.
If you stay here, don't be a cheap ass and try to camp free. Every time someone does that, it takes away from the funds available to keep someone on payroll to maintain it.
There is wifi provided by state parks for a nominal fee. Otherwise, it's in a dead zone for cell service other than SMS.
There is a part of me that wants to give this place no stars, for totally selfish reasons, which others can identify with when they find a spot like this, I'm sure. Every time a place like this gets more good reviews, more people will want to visit, which makes it more crowded and harder to get the peace and quiet I treasure about this place.
I don't live far away, about 90 minutes south, just outside of Guerneville. I like to hop in my microcamper (a 2011 Honda Fit) and come up here on a Sunday morning, and get a drop in spot for the night. I take my easy chair out to the beach and sit for hours, soaking up the solitude. During the off season, this place is an oasis. It's fairly easy to get a spot away from the other campers and avoid the obnoxious brighter-than-the-sun LED "porch lights" of the megadollar RVs that make their way in.
This place has more than enough people who know about it and call it their favorite spot to stay in business for a very long time, so this review is kinda pointless, but I was bored and felt like chiming in anyway.
I love it here.