I would love to see it; but, I think it would be tough.
With only 200K people or so, all of Marin is like Fremont. And, it's more spread out.
I'm sure their are reefers in Marin; but, I bet a lot of them use aquarium service companies.
The best shop in Marin right now is Pet Club in Corte Madera. The manager maintains tanks on the side.
Best of luck,
Roy