Wouldn't canned cat food store for a very long time? Since I have four, plus two dogs, the OP has inspired me. We do reserves on hand, but there's room for improvement.
Keep in mind that changing a pet's food can result in "unpleasant" side effects under normal conditions, much less a stressed situation. Those side effects can add to your own stress also. I send this as one of my German Shepherds just left me a airborne "gift".