This movie brings back memories. I too enjoy the Native American magic overtones and even though the bat attacks are a bit cheesy, I've come to accept them with a chuckle.

Bats are creepy buggers, so the idea of a colony of them killing people is kind of neat. I might have to seek out the book.

I'm watching it now and I never noticed the guy from the Thing is in it. The fella whose head sprouts legs and walks off.