I've been living in a 6x6 ex-Army truck for 14 years, I love it to bits but also I argue against it as a BOV for real TEOTWAWKI. For short-term natural disaster stuff you probably can't do better, just turn the key, drive somewhere safe and sit there in real comfort until it's over.
But for serious WROL it is way too high profile, just a trouble magnet I think. In that case I'll be firing up the Landcruiser, or even the hiking boots.