Rubs and scrapes are usually placed along a buck's or if you are lucky, many bucks' travel routes. Both bucks and does will hit scrapes and one scrape may get used by several different deer. When hunting new areas, rubs and scrapes are a great place to start because you KNOW that there is a buck there. Also, rubs can give you SOME indication of the size of a buck. Big bucks can rub little trees, but usually little bucks don't rub big trees. Stand placement can always be tweeked, but starting near a good amount of buck sign is the way to go IMO. Once you know the area intimately, you can move the stand accordingly if necessary.