I just talked to a ranger at the White Mountain Station. Phone number 760-873-2500. She said that the Ursack Major XL was approved for the Whitney Zone but not recommended. The reason for the non recommendation was that most of the Whitney Trail is above the treeline. The Ursack then cannot be hung from a tree and therefore marmots and other rodents as well as birds could get in through the opening which is closed by a knotted cord. It appears to me that using the double or triple overhand knot does a good job of closing the opening to the smaller critters. We are planning to use the Ursack as it saves ~ 2 lbs and is much easier to pack. We will also use Opsacks in the Ursack to hopefully eliminate odors and as someone mentioned place the Ursack away from our tent with rocks on top of it.
Any comments would be most appreciated. TIA
