Good kit.

In addition to the suggestions already made, I would throw in a medium crescent wrench, regular pliers, and a 10-12" channelocks, a cheap socket set and a couple of screwdrivers. Add a spare low beam bulb and a tail light bulb. I also carry a collapsible lawn chair per traveller.

I have used all of these things out in the boonies at one time or another.

Welcome to ETS.