wheel - 7:41 pm on Jun 16, 2011 (gmt 0)
Bring a way to attach a sling to the cooler and a long rope to suspend it from a tree branch. Attach sling to cooler, attach rope to sling, throw rope over branch, hoist cooler and then tie rope securely.
A bit of googling indicates that the bears are actually smart enough these days to figure this out. Unlike facebook, bears aren't stupid.