The problem with plywood is getting in from here to there. It's heavy and getting a good grip is difficult...especially if you have to carry it for any length of time. An easy solution is to take a couple of C-clamps and tighten them on to each end. This will give you the handle you need to get a good, solid grip.
Regardless of your roof type, hurricane straps are designed to help hold the roof to the walls. Ask your builder to install hurricane straps of galvanized metal. Don’t wait until after your house is constructed; although some people attempt hurricane-strap installation as a do-it-yourself project, the straps are difficult to fit, and improperly placed, they can turn into sharp projectiles in a strong wind.