While there are scattered good moments (the opening shot really catches your attention), this is overall an especially poor rendering of the "city folk vs. hillbilly" formula. The technical side is really poor, with some poor editing during the action sequences, and a REALLY OBVIOUS boom mike at one point. There is also one of the most blatant continuity errors I've seen in ages, involving a sweater that suddenly disappears from one character.
But what really hurts the movie is an especially lame screenplay. There are obvious holes. For example, how did the hillbilly get motorbikes and gas cans up there? How were they able to transport the female character up there? Where's the missus? How come the clan's leader has such inbred idiot sons after we find out his past? It's not just the hillbillys that are written so badly, but the two brothers, who are developed so badly that they each seem to be composed of multiple pieces of greatly different characters. And I won't get to the pretty perverse nature of some nastiness the hillbillys dish out (or try to).