Want a guest book you'll actually look at again? Create a photo book of your engagement photos for guests to sign. This is the best alternative guest book idea I have seen. maybe to go along with a traditional guest book?
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
10 Unique Ideas for Wedding Guest Books: This is the perfect visual reminder for who attended the wedding. Guests simply snap a Polaroid photo when they arrive, secure it in the guest book, and write a note to the bride and groom.