First thing is that we stay well away from major urban areas. Worst comes to worst, remember that most violent crime is baddy on baddy. Most opportunists know full well that all heck will break loose on them for messing with a tourist!
We never let the truck get low enough on fuel that we would need to stop in a shady area. Even if on a freeway, most time you can see the general condition of an area before you edit.
If we do get into a bad area,we just keep rolling. It is only a matter of a few miles and a couple of minutes before we are out of the area.
I think the areas you need to worry about are the rest areas on the interstates.
