If you use an electric fuel pump, the Mini Boss will be inconvenient because it will have to be unplugged each time you remove the battery/starter caddy.

Edited to add: It is discontinued, but I like the Goldberg Mini-Tote.
It holds fuel, glow driver, battery, power panel, starter, and a couple of screwdrivers; which is exactly what I need to fuel and start the engine.

Everything else stays in a couple of big plastic tool boxes, in the truck, until needed. Most days the big boxes are never unloaded.

Something like this would be fairly easy to scratch build by looking at the photo and measuring your field equipment. The bottom and center panel with carry handle are 1/4” aircraft plywood and the rest is 1/8” lite ply. There is tri-stock in the corners and I used epoxy for all of the construction. Other glues would probably be fine but I went for something fuelproof.

Carrell