I thought about tackle boxes, but there seem to be too many too little compartments to use them all.
I have a 20" Flambeau toolbox for all my cleaning gear and tools. A small Rubbermade box and some large pill bottles keep my little items together.
I use a 24" Flambeau box, without the tray, as my "rangebag". It will hold two of my Plano plastic handgun cases, my muffs, and etc..
I like these Flambeaus because the tray just hangs on the top edge, no internal supports to get in the way. Flambeau makes a gun maintenance box, I've seen it on Midway, but what I've got works for me. Mine are the not the newer versions that are supposed to stop rust, I've had them for years.