I agree with all the advice here. We've used the BearVaults for years. Pretty darn easy. One thing to remember is that you don't have to get your first day's food into it---you can carry that in your pack, and eat it on the trail or at camp the first night.
So that gives you a little more room. We figure that we can get five days worth of food for two people in the Bearvault...that should work out to ten days for a single person.
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