it's not a long time before using so i'd expect very little deterioration...but why? if you roll it now chances are high it won't be around by concert time. if keeping it fresh is your main concern, put it into a glass jar with tight seal (mason/fruit jar) and store in a cool, dark place...i keep mine in the fridge.

i saw them a couple years ago at the hard rock and they were awesome! they also greatly appreciated the treats that were tossed up onto the stage...so save a couple for the band!!!