The hillbilly and redneck/backwoods horror subgenre has been around for literaly decades. Deliverance is a good choice, but you can go as far back as the 1960's when HG Lewis and David Friedman brought us the original 2000 Maniacs. Since then there have been numerous entries (both good and bad) that include - Don't Go In the Woods, The Final Terror, Just Before Dawn, The Forest and most recently the Wrong Turn series. Much of what these films thrive on is for us to fear a dirty fellow in overalls. This is precisely why Eli Craig's comedy/horror film Tucker and Dale Vs. Evil works.