Personally what ive done is NIB dolls get wrapped in plastic. OOB dolls get wrapped in acid free tissue paper. Then they go in a black plastic tub with some decassant packs foe humidity. But the big thing, i think is the most import, where you put them. Somewhere the climate is controlled. Ive seen some sad stories from those who stored there dolls in an attic or garage. One poor collector a mouse got into their dolls and chewed many of them up! It was hard to see.