I'm sorta qualified to comment on back country fishing and dangers associated with it. Although we sometimes are armed the Counter Assault Bear Spray is hard to beat. I would feel confident standing off anything that gave me time for a reaction.
The story below is from the blog here on the forum. In the 60 some entries there are many tales of things that go wrong and some that work out swell.
Here's the link; http://www.theflyfishingforum.com/fo...g-up-here.html