"...a wide-scale emergency situation..."

A "wide scale" situation will undoubtedly take in all of the SF Bay and Delta area. The coast south of SF is somewhat more populated than to the north, or at least it used to be. So, depending on what the emergency situation is of course, I am thinking north. Maybe as far as Ft. Bragg, or even Eureka, although that is quite a distance. I would assume (always a dangerous undertaking) that there would be some protected anchorages somewhere in the Point Reyes National Seashore area, but you would have to bring all provisions. There are also a few state parks/beaches along the way where, if you have a dingy/liferaft, you could probably get potable water and maybe take a shower. That is my best non-sailor guess...