Through the first month, try and just stay put. If you are gone someplace and an EMP knocks out the car, you will have to walk. One hard thing will be getting back home if the IRANIANS use an EMP in space. I will have a twelve mile walk. Lucky, my wife only has to walk 1 mile from work. That will take me four to five hours to make it home. Cars won't start after an EMP event. Gotta just leave them for the scavengers.