I only do a few comps a year, so no trailer, no RV etc... We pile the smokers, easy-ups, tables, etc... on a 4'x8' trailer. Everything else goes in the back of the vehicles, so here's what I do.
1 large Rubbermaid for misc camp stuff like extension cords, table leg extensions, collapsible trash cans, bungee cords, etc...
1 smaller Rubbermaid for rubs & sauces
1 smaller Rubbermaid for Therms (guru's, Mavericks, extra probes, instant reads, etc...)
1 smaller Rubbermaid for Cleaning supplies & gloves(dish soap, sponges, Steritabs, aprons, cotton & Nitrile gloves, etc...)
1 smaller Rubbermaid for injectors & brushes (injectors, needles, BBQ brushes, toothpicks, plastic utensils, etc...)
I suggest you layout the stuff you need and try to organize it in a manner that you find useful. Then find totes to accommodate your system.