Some other common issues are;
Parking brake (please practice on flat ground prior to your arrival in Moab)
Cb radio (make sure it works, you buy the beer if you squelch every time you talk)
Excessive play in steering.
No spare tire (don't want to start a debate with the 40" tire crowd, this is for the guy with 33's) Have a good spare tire mounted to your truck and the tools to change it. Many newer trucks have keys to lower the spare or special anti theft lugnuts.
If you have difficulties like, "sometimes it overheats" or "it makes a clicking sound when I turn left" please resolve these issues prior to your arrival in Moab. Solving problems wednesday night at camp or on trail with 20 rigs waiting is not the appropriate place.
98 uzj100. Factory rear-ARB front locked 4.88's. ARB Bull, Warn 9000, Irbis rear bumper, Slee sliders and belly pan. OME t-bars w/863 rears, HID, XM