Like Russell, we're also taking a Bear Vault (BV350 Solo) wt. 2 lbs 1 oz., 440 cubic inches (7.2 ltr)- food for about four days - just in case. I've been calling and asking the Yosemite rangers questions. One ranger warned me that the S29 hybrid is conditionally approved, but said there have been incidents reported with the S29 hybrid. He did not say if the incidents were due to user error or caused by other critters.
Based on watching the videos of the testing by Ursack, I strongly feel that the proper use of the S29 hybrid is a bear resistant solution. However, because one bag was not large enough for our needs, I decided to diversify our risk by not using the same product. I know how to properly use it, but don't know what to expect from other critters
So according to Granny's logic, 11 oz. of prevention is worth 11 pounds of re-hydration not happening in bear belly.