They will probably be ok after a light wash and condition. gibba8.
A few years ago I bought some storage boxes from Ikea. They are fabric over hardboard with zipped lids. I store my winter or summer clothes in these and line them up along the bottom of the wardrobe. They are labelled too.
The clothes come out fresh and mainly ready to wear.
Make sure clothes are laundered before storage, and thoroughly dry and they should be fine however you store them. I would try and avoid the loft tho.