If you can't make it out of a major city, you're dead. If you can't find deep shelter, i.e. a mine shaft, or bomb shelter outside of a city within 12-24 hours, you're dead from fallout.
A gps device with a known location of a wine cellar on the outside of town is your best bet. Of course the EMP will probably knock out your gps, so have a map
Of course you then have the problem of collecting food thats not already irradiated, so lets hope that wine cellar has wheels of cheese.