I've had some sitting around for a month (in Florida) in a sealed bag with no ill effects. As long as the moisture doesn't get to them, they should be fine.
Celebration III!Bottle Conditioning:
Celebration II!Now Serving:
Lil' Sumpin' Sumpin', Celebration Ale, Fat Tire, Two Hearted Ale, Speedway Stout, SNPA, SNPA w/Simcoe, Moose Drool, Dale's Pale Ale, One Buck Bombers I, II, III and IV, Idyllwild Ale I, II, III and IVOn Deck:
Celebration! IVGoogle Maps Water Report