;D  Nothing like bears to get a discussion going....
I believe everyone who weighed in is correct in their advice.  I still am pretty sure I will not ever be attacked by a black bear unless I am tied to a tree and covered in peanut butter.  I doubt if I'll ever take bear spray into the BDub or Q; with my luck if I needed it, it wouldn't be within reach anyway.  ::)
I do look for bear sign (scat or torn up trees and overturned rocks) and do not camp where I find it.  Bears do swim and I have  watched them on a couple separate occasions, swim to my island camps.  One landed and was quickly scared off and on his way.  One swam right by without a look at my site and kept on going.  
We are off for Knife Lake tomorrow.  I'll post our adventures when we return.  ;)