I agree that the bug out scenario is pretty unlikely, some special situations excepted (hurricanes, perhaps). In most situations, I am going to hang out at home, where most of my resources are concentrated. If I have to leave and automobile travel is not feasible (a distinct possibility) I would start out on a bicycle, which will provide about three or four times the distance for the same effort. If I have to abandon the bike and walk, things are really getting tough.

I am most likely to walk in order to get back home, and unite with my family.