What you are doing is called dry aging. You will have shrinkage and drying out doing that. Those are the reasons I age the whole bird. I understand not everyone can do that. Wives object. You should be able to cover it in plastic wrap. That would allow it to age, but reduce evaporation. I think it would also increase the chance for spoilage. New bacteria, introduced AFTER the bird was cleaned, would have a better chance to thrive. That is a GUESS, not a certain fact.