If that is the application for using a bug out bike, and I think it is one of the most useful, I would suggest an occasional commute to and from work to get some experience and work out an effective route.

I have found that every one of my bike routes varied, sometimes fairly significantly, from the route I used when driving a car. Variations are caused by traffic density, hills, good/bad intersections, etc. I have found that a surprising number of trips was necessary to perfect a route, and sometimes the inbound route varied from the outbound route.

If you have pedaled home before you really have to, it will really lower the stress level when the day comes.