I don't know how many local shows you go to, but try to make the GSBF SoCal events and you will meet the same people over and over
Go to the Bonsaiathon in the spring up at the Huntington Gardens in Pasadena. Whatever you do, plan to stay for the Saturday night dinner and silent auction drawing. Every single person in that room is someone you want to know if you want to be connected in the GSBF bonsai crowd. Tom Vuong normally exhibits trees there, and is sometimes one of the demonstrators. But as much as I think highly of Tom, there are a lot of other folk who keep a relatively low profile you should check out. Another "do not miss" is going to be Peter Macasieb - aka
@maria kapra. Super laid-back guy and someone who swings by the forums every now and then