There has never been a confirmed wolf kill on a human in Canada. Besides that there is a large pack that are territorial around 35 near Algonquin park.
After owning 3 generation of G. Shepherds, wolves don't look as intimidating. I've never seen one in the wild, but judging from pictures and the Zoo, they are like the size of a medium dog. I think G. Shepherds have the closest mentality to them when it comes to dogs. Just guessing.