As with any survival gear, geographic location can seriously determine the value of a particular item. Owning a 4X4 in a metropolilan area such as Denver is useless if you can't get out of town ahead of eveyone else. For someone such as myself, it is a far more viable option due to multiple, less traveled evacuation routes. I've hauled my lifted, off-road camper into and out of places that people with less testicular fortitude would dare to tread.
That doesn't mean it's right for eveyone, but it's an option that those than can take advantage of should at least consider.
I normally haul my camper with an 87 Jeep Cherokee with a modest lift, locking diffs, and 31X10.50 tires. I've drug the frame and had the tires hanging 12 inches off the ground, not a pretty sight. My Tacoma has taken it places nearly as ugly.
You can be as prepared as you want to be with $300.00 folding pocket knives and bright assed flashlights, but if you don't have the gonads to survive you'll die anyway.
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What you know isn't as important as knowing what you don't know