The book starts with the protagonist, a shop owner, who gets falsely arrested for murder. While he's being taken away in a police car, he manages to escape and runs off into the woods, which happens to be a national park. He lives in a cave near the top of a hill. At some point in the book, he finds 2 wolf cubs and ends up raising them.
I don't recall much of the middle of the book, but this man does end up making trips to town a few times to get some supplies and befriends someone who doesn't judge him for his past.
At the end of the book, the man learns that his name was cleared for murder and that he could stop hiding.
I believe the whole plot takes place in Michigan, USA, but I'm not 100% sure about that.
I discovered the book first at a garage sale. It was a light blue paperback cover. I think it was written in the late 70s.
Any help would be greatly appreciated, as I misplaced this book.