Harry Crews has a short scene in the documentary "Searching for the Wrong Eyed Jesus". I was not a huge fan of the movie, but it has a couple of cool parts in it, and Harry Crews is one of them. I was born and raised in the Blue Ridge mountains of Virginia so I am usually disappointed by any films or books about the south. They rarely seem to be anything other than a cliched view of the region. Crews, however, is an exception. If you like him you should also look up Breece Pancake. He only wrote a handful of short stories before he killed himself, but the stories are very good, and very true to the region.
I recently read "The Sisters Brothers",and really enjoyed it. It is kind of a Jim Thompson style western that will almost certainly be made into a movie. Read the book first before they start casting the movie.