Drymounting could be done to create a very elegant handmade book effect. But you'd have to store it tightly closed analogous to a flower press. That's because on thin board especially, the differential between the print and backing would want to curl with humidity changes. Archival mounting substrates tend to be quite hydroscopic. If you want to go the adhesive route, don't use a full permanent type,
but removable pressure-sensitive tabs. I don't know who has them nowadays, but in the past I found
Gudy tabs quite useful for portfolio work. Othewise, reusable 3M ATG "Post-It" tape.