Local knowledge is key here. IN the Sierra, bears won't generally go after people at all. They will go after packs, bear cans, and anything that smells like something vaguely edible. But they won't go after people, even if you are wearing Chanel No5 in the evening.

But that may not be true in Grizzly country, or Alaska...
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963