I am in the Southwest, I store my hay in a hay shed. We buy our hay here by the squeeze (64 bale average). My old horse is on a grass pellet and equine senior that is stored in sealed garbage cans and kept in the feed room. During our real humid months at the end of the summer I bring the can with senior into our storage room in the house where it is cooler so it will not have a chance to mold, since it has a small amount of molasses in it. The garbage cans I use will hold 3, 50lb bags. Hope this helps