Looks like all you need to do is clean them enough to be strewn on a dinner table, sort them by type, and press them flat to dry. Then pack them to ship safely to places without yards full of autumn leaves. Or you could just do a couple handfuls of the best ones and use them for your own table at Thanksgiving. An outdated old textbook is good for the pressing part, just separate the leaves by several pages and put another tome on top.