Wandering Jim,
The problem at Trail Camp is not bears. It is marmots. All you really need is a nylon sack, which is secured off the ground, since marmots cannot climb. I have used this technique above the tree line many times and still have not had food taken by any type of varmint.
The rule in the Inyo...and I will paraphrase, a container designed to deny food to a bear. The Ursack meets that criteria.
I am still waiting for either of my Ursacks to be attacked, let alone compromised. I have been using one since 1999.
