Glad to see some intelligent responses here that don't just resort to the romantic vision of bugging out. Let me say once more that my last post was only concerned with the worst possible situation. The vast majority of situations you CAN do things about, but again: in these situations, I don't think you need a bug out location or whatever.
If it is inconvenient, just have extra supplies. No need to go anywhere, or worry except for having supplies till the power/gas/whatever is restored.
If it is impending, the question is: Will all the country be affected, or just right here? If the entire country is affected, again, I think my earlier post still applies. If not, then you just need to get out- no need to go all survivalist in the woods.
If it is catastrophic, refer to my earlier post.
I find nothing wrong with bugging out. But you gotta realize that if you are preparing for the end of the world, that most of your planning is ineffectual. Unless you go Blast from the Past style, your concerns should mostly be about getting out. I disagree with a poster who said the well-prepared were not targets. There's an essay from Robert Heinlein on bugging out, don't have the link right now, that has informed my point of view. Here's an appropriate example of a catastrophe for bugging out: the fall of Saigon- and you're Vietnamese. Oooh: edited to add: Jews/"undesireables" in Europe, late 1930s and 1940s. Now THOSE are situations I can say that bugging out was a good idea. Again, though, if you could just move out to another country, then you would be fine, and safer too.
Basically, you should also remember: long term bugging out should NOT be a consideration unless you've secured your tin foil hat (which, interestingly enough, is the worst thing to use in case of mind control
http://people.csail.mit.edu/rahimi/helmet/). Unless you predict the US government will fall, help will come eventually. If the gov. falls, there will be far more problems of great magnitude to deal with. Either the US would get help from allies, or it would be invaded. Again, a long term, back to the earth bugging out is complete romance if you don't have high level contacts in the DHS to keep you informed.
Essentially, this is what it comes down to: Bugging out if it means a short term evacuation bag is a good thing. If it means post-apocalyptic, then it's silly without magnitudes more money, training, and planning.
My break down:
~Prepare for up to 1.5 months of bugging in
~Prepare for a quick evacuation to another city or safe place
~DON'T get all survivalist unless you devote hundreds if not thousands of man hours to this endeavor, and greater amounts of cash than you probably spend on your car. Oh, and remember: you stand a good chance of dying anyway.
Again, you can disregard my advice, but since most encounters are solved by the first 2, and your life will be consumed by being a survivalist if you do any real preparation for a big catastrophe. There are things in life that you're supposed to be doing and have FUN with! Camping out is great fun, but realize that us going back to the wilderness is make believe. If I REALLY wanted to bug out, I'd either choose to live with the nomadic fisherpeople in the south asian region who knew the tsunami was coming and left, or if there was no nukes or whatever, afghanistan. Primitive? Hell yeah. Been living the same way for thousands of years? Yup. If anyone knows their stuff, it would be them.
Oh, and BTW: Rock, GREAT post. Except you left out earthquakes. That's one I've had to prepare for, and one of those icky catastrophes if big enough. Great thing about quakes is even if you have a bomb shelter/fallout shelter, it doesn't do much good when the masonry is lodged in your head

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Complete Faraday Cage clothes in place, now looking like a prisoner of his own paranoia,
Zero