I love these ideas for guest books – something a bit more creative than the regular signing of the name and a simple message in a formal looking book.
POLAROID GUEST BOOK
My personal favorite is the polaroid guest book. Set up your album a table with a polaroid camera and plenty of film and let the guests take a photo and put in your book along with a message – a lovely souvenir of your day
POSTCARD
For your destination wedding why not use postcards of the location you have chosen, 
sunset beaches, palm trees, whatever is to your liking.
PICTURE FRAMES
You can celebrate your wedding day with a photo frame of your guests best wishes around a photo of your choosing. Choose acid free fine point pens for your guests to write on the matting poster for your wedding photograph.
JENGA
This is another alternative,especially here in Thailand where it is very easy to pick up a wooden game of jenga. Have your guests write on the blocks of jenga.
Wedding Celebrant Samui & Thailand 