Get a code for a free wedding guestbook on Shutterfly’s Facebook page. You just enter your info and you will be given a code for a free 20-page 8×10 photo book. Shipping and additional pages will cost you extra. Your code will be valid until August 11 at 11:59pm PST, so over a month. That gives you a ton of time to organize (or take) your engagement photos, arrange them in a book, and have it ready for the wedding.
Thanks, A Bride on a Budget who offers this advice: “Place the book at your venue’s main entrance, leave a Sharpie nearby, and hope that no one draws a mustache on your face.” :)