It pays to invest in your script

Cooper's Dad is a hoot - "You're not trained to read a map" he tells his son and we're all into his nutty issues with his parents and then the little dog shows up with spider legs.

I'd put this movie in with Tremors (1990)

The writers don't underestimate the audience with a riff on Silence of the Lambs They generally mix things around while still keeping up with the basic suspense of "who will survive?"