I read a blog by this guy who survived Katrina (he fled to Texas well before things got really bad) and he covered something everyone here missed: paperwork. Have copies of EVERYTHING. Insurance papers, home and auto stuff, identifications, current resumes, etc. He wrote about getting to Texas and finding the perfect job to work while waiting for things to blow over, but not getting hired because he lacked credentials. He also mentions dealing with FEMA, why you should avoid shelters unless absolutely necessary for survival, and having papers to ID your kids as well (if a rescue chopper can only take one of you, and it's you and your kid, you'll send your kid first-- but does he have ID, medical info, etc?). It's fun to think about guns, ammo, your zombie mobile, and supplies, but that "boring" stuff is important too. If we had to evacuate my apartment, sure, I could survive for a month or two totally on our own-- but I didn't have anything on me to prove that I owned my apartment, which car was mine, that my guns were legally mine, etc. Hell, if I went missing and my g/f didn't have her ipod or cellphone, there'd be no pic for a "missing persons" poster...
http://www.theplacewithnoname.com/blogs/klessons/