It says 45-55 degrees for dry storage, I don't trust under my house for that kind of heat way down here (on short pillars with siding/skirting to the ground.) What about putting in the ground where you don't want them, but can move them again in the spring? When the foliage pops up, you'll know where they are. Then they can have a normal winter at least. I would put a foot or so of leaves over them, since they won't have much chance to get settled. An out-of-the-way spot in the back yard?
