What I bring is largely determined by two factors:
1. How far from home I will be if poop hits the fan.
2. What I suspect/know to be an issue.
If I go to Moab, I may bring a whole 3rd member, axle shafts, and a complete assortment of fluids. However, if I am going to be an hour from home, I will bring a basic tool kit and recovery gear and any spare replacement where I might suspect being a weak link.
Just another .02
My rig... "Maude"
1976 FJ40 with some stuff and some leaks.
1999 UZJ 100 Series bone stock ready to rock AKA:The backup minivan
2012 Toyota Sienna Minivan, fastest Toyota in the stable.
My camping trailer build up thread.
"You 80 guys are just a Sawzall away from nirvana." -Red Chili