Yes, make sure they are COMPLETELY dry. Feeling dry to touch isn't dry enough. Otherwise, any attempt to put it in sleeves or envelope will end up marking the delicate emulsion surface.

If you already have sleeves on order, you can just leave it in dry and dust free environment. It won't hurt anything. I've done that for a week or more for one reason or another with mine. You can also let it roll back into a losely wound roll, then put it in a zip loc bag. I've done that too.