I live in the bay and use to live in SF. SF would be complete hell! If I were you, I would head south towards Santa Cruz by following the coast. Don't even try to stay in SF! Way to many people to worry about. The only thing SF would be good for is to maybe grab a few guns and food. Anything else will just screw you over in the end. Don't try to leave the land while in SF because either you'll be followed by crowds of desperate people wanting to survive, followed by the zed and risk being surrounded, or held up by other people trying to survive. I doubt you'll be able to get to wherever your boat is anyways. Follow the coast to the south and for sure you'll find a boat eventually.

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