I don't know but my first choice would be couple an used ATV's with trailers. You can get out of Dodge faster and further with less fuel and without being detected as fast, and you don't need roads at all for them. A sheilding of lead flashing around the CD boxs will protect it just fine. Ya also have to keep in mind hiding them when you get to where you want to be, unimogs are awsome but huge, and that could just ruin your whole day if your detected. After all you're just trying to get to your secondary position undetected and which should be already set up anyways. Come "bug out" time speed and mobility should be your primary concerns, an ATV will do all of that for you and better. Plus there just plain DAMN FUN, till that SHTF point comes. I've driven all types of off road rigs and an ATV will get you places that nothing else will, period, unimog included. Remember ya still have to get between the trees and rocks, even a logging road can become a choke point. After all you can zip under a blow down and hide an ATV instantly, try that with a unimog or a jeep, not going to work very well, to exposed and big. ATV's are my choice. And you can get 3-4 good used smaller ATV's for the same price.