This is supposed to be based on a story by Algernon Blackwood. I haven't read much of his work and I'm guessing it might be one of the John Silence stories... There's one titled "The Camp and the Dog". Dwayne Carter the, psychiatrist, is described as having an "uncanny sixth sense" so maybe the name has been changed... I have got to get a copy of the Dover collection of John Silence stories.
A camping expedition to a small, wooded island in the Baltic is threatened by a werewolf among them. The whole business is not scary but it is interesting... A different take on werewolves. 