Hang them on quality hangers (I prefer those from Scotweb or Celtic Croft) in a cedar lined closet, or in that is not available in hanging clothes wardrobes or garment bags with cedar or mothballs or even lavendar, depending on your desire for strength of effectiveness and residual odors after removal from storage. Rolled or folded is fine for transport afterwhich they will usually need a good steaming or potentially a pressing to clear out the wrinkle, but if left in that condition for long periods someo f the creases and wrinkles may be come nearly permanent.