Just got one of these for Christmas from my siblings. It caught me totally off guard, so I don't have a beer ready to go in at the moment, but will brew a batch asap. How long can the barrel rest as is? I'd be putting in a beer post fermentation, so the earliest I could throw a batch in would likely be the 3rd week of January. Is the barrel fine without any type of treatment till then? The whiskey is strong with this one, just emptied on 12/10.