Favor idea?

So, I've mentioned two friends who recently became engaged. They are considering a wedding in the Adirondacks; and while I know they wanted to distribute mini-trees or plants as their favors (very green, they are), I've come up with an alternate suggestion! I love the vintage postcards from CardCow. What about getting a vintage image of the location where you get married and reproducing old-fashioned postcards on recycled cardstock for your guests? Let's say, packages of 10?