If anyone looking at this thread is interested in more info on how to carry or store food in bear country, Gauvins started a good thread a year ago on bear canisters.
Bear canisters

I mentioned in that thread that I had bought an Ursack, used it this past fall on a canoe trip in Northern Minnesota (black bear, not grizzly country). I am sold on it. That said, some national parks apparently do not allow Ursacks.