I prefer to keep 2 fied boxes myself..
OK maybe 3

One is just a big tackle box I keep spare parts in, props, tools glow plugs, a roll of packing tape for quick monokote repairs.

the 2nd is more of a big tray that I can pack the fuel cans, paper towels, cleaners and the 3rd box (the starter kit).. the top of this one is cut out so it's also a field stand for the planes.

3rd box.. is the starter kit
It's just a small thing I can haul out the the startup pad that holds the power pannel, battery, starter, glow ignitor and a few spare plugs.

I guess I could cut it down to 2 boxes (field kit and starter kit) but I'm always hauling the tool box into the shop when I'm building.
I don't wnat to bring the fuel in with me.
I don't have 2 sets of tools so it's either bring in the whole box or bring in a few and forget em next time I go flying.