In CA you may transport any firearm you legally own in your car if it is not loaded. Put your handguns in the trunk, put your ammo anywhere you want it but do not have it in your pocket or close to hand(where you could possibly load it quickly into your gun). If the cops ask you where you are going, and they will, say you have been shooting and are going home, or that you are going shooting, either at a range or in a public forest(which is still legal). Handguns must be locked in a box and the trunk qualifies for that, unfortunately your glove box doesn't. Ammo isn't a problem unless it is close to hand, but consider putting that in your trunk also.
All these things are taught in CCW classes and even if you can't get one in your county(I have one in mine, easy to get in a red county)you can benefit from the classes.