All the California shops I'm aware of cater mainly to compound shooters, and some, like my local store, Wilderness Archery, also have a small selection of trad gear.
It's a little out of your way, but since you're coming all the way from Finland....if there is any way, try to arrange a visit to Raptor Archery in Hood River, Oregon, owned by Ted Fry. Raptor Archery is so much more than a trad archery shop; it is really a trad archery museum.
There are a few of us trad shooters spread around the state. Let me know if your trip takes you near Sacramento, and I'll be happy to take you shooting at our local range, and provide you with a bow to shoot with if you don't have one with you.