This
blog gives some credibility to Bee's Olde Dude.
From the blog.(The quote is from Caitlin Lee-Roney, a wildlife biologist and expert insider at Yosemite National Park.):
Bears continue to be active in Yosemite’s backcountry. In the wilderness near the Snow Creek footbridge, she reported that “many visitors have reported seeing a bear rolling bear canisters away from campsites.”
“A sow with cubs has been reportedly checking out bear canisters at the Cloud’s Rest junction on the John Muir Trail,” she wrote.
