I think ya'll are making it harder than it has to be. Ga law only addresses handguns in vehicles, you can carry your rifle, shotguns, long gun loaded or not as you see fit, either in the passenger compartment or in the trunk. You can have your car or truck parked in the beer joint parking lot loaded or not. The law is mute on open carry in a restaurant that serves alcohol, I suspect the owner of the place will advise you on whether or not you are welcome, probably rather quickly.
"open and exposed to view" means that it is readily identifiable as a handgun if it is to be left in the open while you are driving. It can be in a holster, but it has to be open and exposed to view...
WHATEVER YOU DO, don't keep it with your proof of insurance or drivers license. I almost put a .357 round thru a drivers ear who thought I didn't need to know his cocked and locked Govt Model was in the glove box with his insurance paperwork.
ETA: it can be loaded in the glovebox, console or in plain view, you do not have to keep the ammo seperate....this ain't New Jersey or some other Commie state....