I was down in Florida this year for each one of the hurricanes ( Charlie, Francis, Jeanne ... and we got "rained on" by what was left of Ivan circling back.)
Should you get down there, and be stuck during the Hurricane, Don't worry - Your probably at the safest place in the Orlando area.
I was on a Hurricane Ride-Out crew for Hurricane Frances at the Contemporary Resort, and Disney did everything within their power to do what they could to make the hurricane as painless as possible.
I wouldn't worry about staying at Disney during the Hurricane season at all. Should one hit, you are in good hands.