A Toyota Landcruiser FJ 80......done
Seriously though, if you have the room, I would pack 2 small jack stands and a piece of 3/4" plywood 14"x14" to set the stands on. Servicing in the field can be sketchy at best if you're solely relying on a hi lift jack.
I would also carry pig mat or any other absorbent pad for cleaning up spills
A few empty containers for used oil if you would need to drain for any reason.
A way to add fluids. You can't hold a quart of ATF up to an r380 and pour it in. Likewise with the lt230. Make some sort of screw on adapter to a long piece of hose so you can properly fill needed components.