Too Much Of The Prisoners, Not Enough Of The Mountain Men
I think one of this films major flaws was just that. They spent way too much time on the prisoners when they could have been showing the Mountain Men, I mean Mountain Man (C'mon only one? Compared to how many they had in the other two that was just disappointing).
Overall it was OK for a Horror film, but a disappointing sequel to the first two films which were awesome!