Instead of plywood, we've opted for a tarp and 2 x 4 system. Not sure if it's going to do any good, but it gives our house a special under-the-sea kind of feeling.
Part of our hurricane preparation has been to move everything that was once in the backyard inside. It's like a garden party all the time! If we lose power, it will be like a backyard BBQ all the time, even to cook oatmeal.