I store mine dry, however ffrom what I have read, they seem to be fine when stored wet.
As a thought, you might like to put them on a colony at the end of July or in August, say, over an open feed hole. If there is anything of interest, I guess the bees take it down to the colony as they prepare for winter. After a couple of weeks, the supers could be taken off again.
May your bees read the same books as you do.