Are you going to stay on site or just drive down for the day? The parking adds up quickly if you go every weekend for just the day. If you stay on site the parking is included in your hotel stay.
We always stay on site and NEVER go during black out periods because it is a mad house at those times. I wouldn't go to Disney if I had to go during black out periods,seriously. So the seasonal pass is great for the way we do Disney.
I'm trying to remember, the seasonal pass is around $240, the Fl resident annual pass is somewhere around $400 isn't it? That's a lot of parking.