To answer the part that was not exactly answered, the AAA parking pass doesn't give you free parking, just a different area of the parking lot to park in.
Different AAA offices seem to handle giving it out differntly. Some only give it out to people purchasing entire packages from AAA (and only give one pass per package). Others will give it out with purchase of tickets, but how many and what kind seem to vary.
Somebody posted the blackout dates a while ago.
If you have an AP or are staying at a WDW resort, you will have free parking.