Photo posters would be a great addition at a wedding reception. They are printed on heavy paper so you could tape them up at your reception hall. After your big day you can frame them and hang them in your new home.
You could use your engagement photo to make your poster and have it as a lasting portrait framed in your home. We could even use childhood photos of the bride and groom and put them together to make a poster, what a unique addition to your wedding décor.