When you go camping, you expect to put up with a few hardships--bugs, mosquitoes, maybe even some rain. But you don't expect your weekend to include kidnapping, guns, and fighting for your life.
A great deal of the movie is taken up with shots of people running through the woods, and bizarrely ending up at the campsite setup by the two couples. The plot is quite predictable, and like many films of this genre, the the good guys don't take the opportunity to finish the bad guys off as soon as they could. My score is 4/10.