If you see that a really big storm is going to hit the SF area you should fly out and go to Ocean Beach after. The area around golden gate park was a large area of cemeteries back in the 1800’s and they exhumed all the bodies for reinterrment to make room and dumped the headstones on the coast for erosion control where they were sanded over. On low tide after big storm it exposes lots of ~1860’s to 1900 headstones.
Since the beach there is FED, you can’t detect, but there has been talk of relegating that stretch of beach back to the city so people can off leash their dogs there. If that happens there will be several dozen of us dirt fishers down there because it is essentially virgin ground and it is loaded with shiny stuff :-)
It would be a 3000 mile trip for me but you make it awfully tempting.
:)