Ken, rent some scaffolding, and get yourself a helper. Moving plywood by yourself on one ladder is suicide. Gravity can be so unforgiving. With a properly installed scaffold, you have a safe platform to work on, you have a place to keep your materials, etc. You can also pull up the panels with a rope, if you are on top and the helper is feeding you the material. Last I looked, a scaffold rental is a lot less expensive than a surgeon trying to repair your back.