Instead of a guest book, try a polaroid scrapbook. Make sure the polaroid camera has plenty of film. Wedding guest can strike a pose then leave their photo on the guest book, together with their short message for the couple. INSTEAD OF GUESTBOOK IDEA
A photo guest book - polaroid and washi tape! Get a cheap but cute polaroid camera, a blank notebook, and washi tape in your chosen colors. Have guests take photos and then leave a message underneath. Love this, but polaroid film is expensive and rare!