It never ceases to amaze me how afraid some people are of bears. I'm not saying to recklessly do foolish things around them, but you really have to provoke a black bear before they will become agressive. By provoking I mean getting on into a corner, messing with cubs etc. Occasionally you'll catch one by suprise in very close quarters and you'll have to do some fancy talking to get them calmed down. I can't tell you how many times I watched a bear feeding in front of me unaware of my presence until they caught a wiff of me. 99% of the time they don't even look up and turn the other way doing 90mph outta there.
Don't worry about the bears getting your food. If they know you are there, they aren't coming close.
As for the Canadian strain? I'm really wondering there. I have read and heard countless numbers of people come back saying how agressive the blackies are there. Must be something in the water.