If you already camp you know that end (beer, women, food, TP, e-tool for digging cat holes, etc).
Firearms, especially in the hands of untrained, people/drunks (or even trained drunks) are a disaster waiting to happen (IMO). (I have never need one in more than 40 years camping or 25 years wheeling; I am a firearm enthusiast).
In a Jeep bring tools, spare parts, fluids, hoses, clamps, rescue stuff like snatch strap & shackles (basically standard four wheeling gear).
Don't forget a practical first aid kit; and formal first responder training in how to use it...
There are horrendously long overly detailed lists out there on the web and here at JF but the best list is the one that you make yourself after determining what you need and what you need to leave behind (IMO), it depends on your camping/wheeling level, the trip, and the terrain you are going into.
...a well prepped, well driven, vehicle should do well in any terrain, including the highway.
Carburetors became obsolete during the last century... do what ever it takes to get fuel injection...It makes bigger grins off road.