We stayed at Wright's Beach which is part of the Sonoma SB Campground. It's a relatively small campground with part of it dedicated to RVs (super close to the beach). The individual sites are quite small, all have a picnic table and a fire ring but are nothing special. The location is fantastic though. Almost right on the beach, you can hear the Ocean and walk to the beach with your morning cup of coffee before it gets cold.

A great place to escape the summer heat - it's often overcast and a lot cooler on the coast. Bring layers! The sites book up well in advance, but you might get lucky with a mid-week reservation.