Although LA can be pretty draconian in their application of law, it remains legal to UOC (Unloaded Open Carry) there. You do not need to research GFSZ's, as the law requires you have "reasonable knowledge" of the location. Being from out of state pretty much cinches lack of knowledge.
LAPD does not like UOC (do a search for: San Pedro and look for the video's), so you take your legal standing in your own hands.
Bakersfield....not so much.