Re: "If you're going to San Francisco....."
Cool, you'll love it, congrats. I almost moved my family to San Francisco earlier this year.
You can also head into wine country just north of there, Napa Valley.
Wish I could tell you more about some great places to see, I'm not the resident expert.
I would PM Harvey C for some tips, he also has his chestnut farm within driving distance from there.
Apologies in advance if I am slow to reply to your PM. I suggest posting in the forums for support if you need something urgent.