Amazing location, okay campground
I can't think of a better place to camp on or near Mt. Tamalpais than Pantoll in terns of the access to trails and the various parks in the area. From Pantoll you have very easy access to the summit of Mt. Tamalpais, easy access Stinson Beach and the coast, plus you can even skip the long lines and shuttles to get into Muir Woods. There are literally days worth of great hiking accessible from Pantoll!
That said, the campground, while nicely maintained and well-equipped is right next to a relatively busy road and during daylight hours, especially in the high-traffic times of the year, the sites themselves are very exposed to all the day visitors.
Speaking of day visitors, I don't recall if you get a dedicated parking space with a campsite or not, but parking can be a challenge here due to the popularity of the various trailheads, and the limited parking.