Dedicated tool set is the idea, my problem is-I've never had a "normal 4Runner project" or any project on it for that matter! I have little notion of where to start!It's easy, just use the tools you need for your normal 4Rumner projects at home. Then have that exact set in your vehicle for trail repairs. if it all possible, don't use the trail tools as your garage tools. Yeah you will have double tools but once you have your trail tool set up it should always stay in the back of the rig.
The exception being the gigantic socket for the front hub, it's too rare of a tool and it should always be in the back of your rig. Borrow it from the rig use it, then put it back in the rig. Good chance you may never use it for your own use, but if somebody else breaks something on the front end on the trail you can help out and contribute. You also need a gigantic wrench handle for that socket
Disclaimer: I have had quite a few shots of whiskey from the neighbor camper so I hope this all made sense!