Holy cow!
It's apparant you guys don't travel with a female companion who MUST have make-up & hair stuff, several pairs of shoes and 2 changes of clothes per day.
With all these parts & tools, you're starting to scare me.
There's 3 reasons I can think of for failures during road trips.
1. Wear & tear from high mileage
2. Failure due to age
3. Murphy's law, which means you will never have what you need anyway
What about this....
Before going on the first long trip, do some higher echelon preventative maintenance.
1. replace the alternator (keep the original)
2. replace the water pump (while the alternator is off (1/2 the job)
3. replace the coolant hoses, (incld T/B coolant hoses) (while the pump is off)
4. replace the thermostat (while the hoses are off)
5. replace the belt tensioner pully (not the tensioner) (while the belt is off)
6. replace the serpentine belt (when you go back together)
7. replace the coils & wires
8. replace injectors on 90~92 (and all o-rings) while the plenum is off
Routine maintenance should also include
1. removal of the cooling stack to thoroughly clean debris from the radiator
2. replace spark plugs
3. tighten oil pan bolts
4. check for oil cooler line leaks, repair as required
5. check P/S hoses, tighten suction hose clamps
6. normal stuff, chng oil & filter, check trans & diff fluid levels, tires, etc.
You have now greatly reduced the liklihood of a trip spoiling breakdown associated with the LT5. Of course, there are no guarantees, even in a new car. Working on my cars is a lot of fun for me, but not so fun along the road, in the weather and not having just the right tool.