I think you should keep both the booklet and the stamp card for those who like to utilize both items. One change that could be made is to use both sides of the stamp card and make it half the size. It would make it easier to put it in a smaller size ziplock baggie. And/or you could put it on a 1/2 size clip board (DollarTree) and it should fit right in the side pocket of your cargo pants.
