There's a brick & mortar club in the Riverside area, if I'm not mistaken. Attend their monthly meeting, and see who comes into the "find of the month display" with the oldies. Ie.: not just the sandbox hunters with matchbox cars and clad, but see who comes in with old silver coins and such

My experience is that aces like that, tend to mingle with like-ACES. So if you have a spot that you've milked old silver (seateds and barbers or whatever), and you come in with a shadow box of those, you will tend to get the aces to warm up to you, and be willing to swap sites

It's only natural that those that have researched out good spots, and now how to make their units sing there, will want to pace themselves with persons of like caliber, not persons who tag along and expect them to do all the research, teaching, etc.... Yeah I know, it's a "catch 22", because how are you supposed to know the type sites, settings, techniques, etc....
unless someone shows you? Doh!
also get on the Kinzli forum, which is specifically for CA only posters. To get past the main page, you have to sign up, but it's easy: just pick a name and password.