I was thinking of that, but decided that if I can mount the Jerry Cans to the front bumper, like the First Overland guys did, I can use that space under the seat for a basic tool kit and some fluids (engine oil, brake fluid, gearbox oil). It's the only locking part of the truck. (No door locks on this truck - that's one of the reasons for not bringing anything of value that I can't carry on my person.)
On most of my trips to anywhere interesting, I find I end up not using 90% of what I bring, unless I am deep in the jungle somewhere. I explored East Timor in a beat-up, borrowed former UN Hilux one time. It came with nothing, not even a jack or a spare tire. My whole kit fit in a 20L backpack. Toothbrush, Mozzie-net, Deet, a change of clothes, and my camera. Not having to worry about my gear let me experience the country in a whole new way. I happily abandoned the truck on a beach and got a fisherman to take me to Jaco Island to explore. I wasn't concerned about people breaking into the truck, because I left nothing inside it.
Food is available everywhere there are people, and planning well and eating simply, means not worrying about leftovers, not needing a fridge or cooler, etc. Our friend Ara (and his dog Spirit) live off a bike and sidecar. He is a gourmet chef. He showed us that you really don't need a fridge or cooler to eat well on the road. Buy fresh, and eat what you buy. Lots of food can last for a few days or a week without refrigeration. Simple spices and seasoning take little space and go a long way.
Our regular kitchen bag (attached with my hat to show scale) is about 12 x 10 x 14 inches, and contains our deep cast iron pan, 5 stainless bowl-plates, 5 cups, assorted cooking and eating utensils, a lighter for the stove, our snowpeak knife/cutting board, seasoning, cooking oil, a washing-up sponge with detergent, and a Coughlan's folding sink. We've used this setup for about 8 years now, and it has fed our family of 5 many great meals. The only part of our kitchen that doesn't fit in the bag is the Coleman stove. I have an old mid-60's stove that I got at a garage sale for about a dollar. It's been everywhere and refuses to die. I was thinking of using it on this trip since it runs on gasoline, but to save space and weight I think I may use an MSR Dragonfly instead.
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