Well, since you drive a Jeep <insert appropriate Jeep-deprecating joke here>.
Now that that's out of the way, failure is unpredictable. Recently,
@Michael had one of those on the Mojave trip, who could have guessed that a radiator would do that?
Later, same trip, I had a supercharger belt idler pulley fail, causing all manner of havoc and chaos under the hood, including taking out the A/C belt.
Michael wasn't carrying a spare radiator, and I didn't have a spare pulley, what to do.
You have stuff that makes the minimum do-able. In other words, I had tools to remediate the damage caused by the pulley. I removed the belt, and later on installed the spare A/C belt I had stuffed in the back, because, well it was hot and I wanted AC! But I limped home without a supercharger. Painful but do-able.
You get to know your truck, right? I had a premonition that I should worry about those pulley's but did nothing about it. I paid the price.
Become familiar with your vehicle, know it's weak spots and idiosyncrasies. Carry spares to get you out, not to perform a perfect repair every time.
When I got home, I re-did the entire belt system on the front of the engine, including a replacement alternator, because I had a premonition that 160,000+ miles on an alternator was a good time to change that. And I found that the pulley remnants took out one of the fan blades. Time for a new fan. Spare in the garage, not in the car.
Carry tools to do the things your truck needs. Jeep needs are different than Toyota needs are different than Land Rover needs, etc.
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I also carry a lot of the common tools that are good in a variety of needs. I have a cool, inexpensive way to make a hose clamp of any size, which means I don't have to carry a lot of different sized hose clamps. I carry an on-board welder and have used it.
I'm too heavy I think and could pare down a bit but I like being prepared, for not only my emergency, but to be able to assist someone else that might have a problem.
And if that problem is a broken distributor cap on a Landcruiser 80, I now carry a spare for you! What are the odds of that happening?
Dan.