Since you said time was a factor, I would put their Wedding picture and their children on a smaller wallhanging size. I would put a solid light background on the back and bring Pigma pens for everyone to sign the back or write something etc. I did a photo album slip cover once with a picture on the front and all the rest plain fabric and brought Pigma pens for everyone to sign it. I filled the album with lots of old pictures and it was fun to look at all the old pictures and sign the fabric.