A Land So Strange: The Epic Journey of Cabeza de Vaca
True story of a Spanish conquistador who was taken as a slave of the Native Americans and later escaped to cross North America on foot (and nude). Too much to summarize here, but the story is definitely "epic".
Texas? Ever read the account of Cabeza de Vaca? Might give you an idea of what you'd be in for (all be it aroud 500 years later the we're talking here).
Just finished reading A Land So Strange It's a great telling of his journy.