I am considering getting a small (5-7 gallon) used oak barrel to add a little "something" to my cider/beer making. It will be a one-time use whiskey barrel...and my thoughts are to wash it then use Star-San to sanitize it. My first use of it will be to fill it with purified water and let the water sit in it for a few weeks, then use the water to make a hard cider from concentrate. Any thoughts?