After reading this post and having no interaction with bears, I'm definatly rigging a tarp several hundred feet from my sleeping set up. I usually don't carry food that is too pungent an odor,except maybe some jerky sealed in it's package. (i may rethink that) But I will increase my overall weight with my 45cal. next trip.
BTW when I was camping last trip, I heard hunters blasting away at deer and that night I was awaken by what sounded like a pack of dogs chasing and killing something probably about 200 to 300 yards away. Something got chased down, killed and eaten. Couldn't tell from the yapping what kinda dogs they were.