Recovery gear or spare parts?
Recovery gear list of random order.
set of metric tools including torque wrench.
hi lift jack
CB or even better Ham
Spare CV (IFS) or short/long side axles
Fluids (90 wt, oil, coolant, brake fluid, ps fluid)
Most importantly stay on top of preventive maintence and every so often or before a trail run roll under the truck and make sure bolts are tight. Watch for leaks!
Depends also how hard your are going to wheel it as far the spare parts go. Good rule of thumb don't go alone.
That's all I can think of....I am sure I missed something.
TLCA # 19524