For those of you who have done or plan to do a photo guestbook, what are your suggestions on adhesive for the photos? We have 2 instax mini cameras and plenty of film. I'm debating between flat photo mounting squares or glue sticks. I feel like glue will be faster and easier for guests because peeling those little mounting squares is a pain, but I'm worried about photos falling out if the glue doesn't dry fast. I considered photo corners, but our guestbook maker advises against them since they are bulky. Help!!