The question is absolutely on topic! I'm moving this thread to the Tournaments and changing the name to hopefully get more eyes on it.
Unfortunately I don't know of any events in that area, myself. If it turns out there isn't much of a vintage community there ... maybe try and start one
There are no full proxy vintage events at stores in the Bay Area.
In past years, there were three stores that sporadically ran proxy vintage events (anywhere between 10-20 proxies normally). There is currently only one store that runs monthly vintage (15 card proxy). This shop is Eudo Games. Their next vintage event is May 20th - this Sunday.
also, does anyone have advice about tournament organization, with which I have no experience with (nor am i an mtg judge), or can put me in touch with someone who does? like, price support, publicity, location, admission caps, dealing with time issues or otherwise, etc.
currently, I just play with my housemates and other friends. I'd be more than happy to plan the event, but I wouldn't want vintage players (who I won't personally know) to not have a good time, from my not planning or communicating it correctly