Putting a full journal on my shelf when I get home, is always the last part of any trip. This trip, however, I came home with just the signatures of the book, and needed to sew them all together. I chose a National Geographic map of Peru for the front and back, with the Sacred Valley and all our stops on the trip visible, and used a soft binding.
For the collection of ephemera that I hadn't glued in, I made a folder on the back from a brochure that I picked up along the way.
This worked out perfectly to leave me with a journal that doesn't bulge and holds everything snugly.