We brought a queen size flat sheet with us on our trip. We had already downgraded it to toy status back home. It was our Sheet Car, beach blanket, fort material, etc. It had been So Useful. We have used it as a bottom sheet on KOA mattresses (the cabins come without linens), we've used it for play, we used it to rope off or sleeping area when we were all jammed into Dad's cabin on Winnepesaukee, and we've used it in several motels to separate Beatrice's sleeping area from the rest of us (see below). It doesn't do anything for noise of course, but just having a visual separation is amazingly useful for both her and us.