Be carefull of the maquees and monitor bezels !!! You might want to pull any that are silkscreened or painted and keep them someplace warm.
The thermal cycling in early and late winter (large shifts in temp between day and night) causes expansion and contration. The glass and the silkscreened artwork will expand and contract at different rates causing cracking. Plus the subsequent formation of condensation can wreak havok with other forms of artwork and any open switch contacts like those found in leaf type joysticks and buttons.
In addition, those places tend to be dark, with little to no airflow circulation, so watchout for mold formation. Condensation on the wood will promote mold when the weather warms up enough in the spring.
An operator friend of mine has a whole pile of electromechanical pins, desperate for storage one winter, he rented a large shipping container and had it put behind his shop. Loaded all the pins in it and sealed it up for the winter. Come spring he opened it up to find many of the backglass artwork cracked, peeling and otherwise in bad shape and most of the EM pins no longer working fully!! He was crushed. Getting the pins working is no big deal, but alot of those backglasses are not replaceable.
I'm not trying to scare ya out of it or anything.

Just to let you know. You'll probably be just fine, it's really going to depend on what the weather is like.
Pull any silkscreened plexi and glass and put them in warm storage, don't wrap the cabs up tight so any condensation can evaporate off them, put them on pallets so they are off the concrete, leave some room between them so air can move around some and get them out as early in the spring as you can (that's the worst time for them).
D