I'm so excited about your desire and ideas. It sounds like you are on your way to being very successful in making a great collection of ornament scrapbook albums. If you don't mind my suggestion; I'd say you should put 4 photos on each page. Use two 3x5 or smaller photos of each (one/group/set) front and back and one journaling box of the same 3x5 size with a blank shadowbox for additional future text. It would help establish an easy to follow pattern should you pass your collection of ornaments or scrapbooks on to the next(male or female)generation. I don't collect ornaments but if I did, I'd love to use your idea.
hint: If you can't resize and print photos from home, Walmart has a machine that lets you choose from several photo sizes. Some of the products are available there too if you can't get them here.