Called Nov 2019 and they have no dedicated dump station.
July 7, 2019 - reviewed by Dan
Good location to take the ferry to the city. Clean shower. Nice people, very friendly.
September 16, 2016 - reviewed by Laura
Good Camping For Visiting San Francisco
In walking distance to the ferry terminal for taking the ferry to san francisco. Clean bathroom and free showers. Not that cheap but i think the cheapest one around san francisco bay. For the ferry you can buy clipper card so the fare get less. Important you need one card per person!! Friendly and helpfull staff