Yes you will be fine to store them for the winter, just keep them in a cool dry place and not the garage or attick, Placing them into a regulator bag or box is a very good idea, if your using a dry box, throw in a small bag oc dessicant or a moisture grabbing thing inside with them, this will keep any humidity from forming inside.
Make sure you clean them with water or blow them out and test before using them. if they don't act right take em down to be checked in plenty of time before your dive so you won't be without them prior to your next event...
