This sign is powerful, succinct, and highly readable. It takes time to make a great poster. Allow 2 to 3 days to assemble all the bits and pieces, such as photos or laser copies, and then 1.5 to 2 days to cut all the boards and assemble the poster physically. That last bit of data you rush around to get at the last moment will go completely unnoticed if your poster is messy and disorganized i.e. illegible and unreadable. Assembling your own poster on mounting boards is cheapest and one piece, color dye emulsion prints that you can roll up to transport are the most expensive.
Portability is worth considering.
The poster should fit into carry-on luggage so that even if your suitcase is lost, you can still present your work. If all your poster panels can stack and be packaged together, so much the better. A great poster is easy to assemble on site and can be flexible in assembly in case the poster space is smaller than advertised. If you cannot mount the poster by yourself or the poster is awkward for one person to mount on the materials provided, be sure you arrange for someone to help you. Often the person next to you will be glad to exchange labor.