So if you are open carrying a loaded or unloaded handgun in a bank, grocery store, sidewalk or street, or inside a vehicle as you drive down the highway, or in a national park on foot or in a vehicle, the analysis is the same as above.
First, where are you? If you are in an unincorporated area, then has the locality banned all discharge? If not, the AB 144's changes to the law do not reach you, nor do the police have power to conduct "e-checks," the police stops for load conditions they will still do inside cities for folks carrying long guns.. However, continue - what other law might apply to criminalize your conduct? School zone anyone?
AB 144 really did not change as much as people think it did - it's just an issue of situational awareness.
Folks should find some unincorporated but public places to hold some nice OC picnics.