Welcome,
Depending on how long and what your planning on doing/ taking..,
+1 for Tony's list. Lights on the bar bit too essential depending on when your driving.
We're doing the cape from melb this year and have to put on the bar, snorkel and money depending, exhaust, gauges, egr blocking plate and extra fuel tank. Already have the canopy, UHF and bat system.
Offroad...?, prolly protection for the underside.
Have fun.