I just pile up all of each particular category and/or type of thing into its own locker.
A locker for loaded guns, one for empty guns and misc weapons, one for ammo, one for food, one for drinks, one for alcohol, one for containers, one for clothing, etc… Admittedly this takes a decent amount of time to get setup, but once I have it working it’s trivial to use.
When I switch to a mobile base I just setup the trunks in the same pattern in my vehicle, so I don’t have to memorize it all again.
Though my pile of crafting stuff is all piled onto a 3x3 of counters so I don’t have to find anything when I want to craft. This also lets me use the advanced inventory screen to grab up anything specific easily.