Looking in your generous outside storage cabinet:
- Your tools on the right-hand wall may eventually bounce off those hooks they're hanging on.
- An air compressor would be nice so you can limp along if a tire should develop a slow leak out in the middle of nowhere.
- A small ultra-quiet and light-weight Honda 1000i portable generator for some ... emergency drycamping 120V AC power, quiet non-solar coach battery charging, and emergency charging of all batteries should everything go flat enough that the engine can't be started. (Boy ... I sure miss an engine crank on our RV like used to be on the good old MGA I had in college.)
I'm kindof just kidding on the three over-the-top issues I mentioned above ... you look like you're already pretty far along on getting ready for some serious RV trips. Enjoy! ;)