Exodus by Geoff Livingston
A dark stranger arrives in the middle of the night, ripping open a centuries-old wound in post apocalyptic Harpers Ferry. Religious zealots have risen from the South, conquering all that stands before them. Now Jason must help his fellow villagers escape to a land far away to preserve their culture and buy enough time to build a defense. Can they succeed without any technology in the face of a rugged American continent?