I saw the preview but haven't see the movie. I live in Alaska and I have worked in villages and camps above the Arctic circle. So the first thing I notice is a Deputy Sheriff driving an SUV..... but there is no such thing as a Sheriff's Dept. in Alaska. We have City police departments, State troopers, and Public Safety Officers in some of the villages. Of course Canada has considerable real estate in the arctic too, but I'm pretty sure they don't have Sheriffs either.
Yes, I expect some accuracy in a movie. Especially one about the Undead!