PKS44....
We live very close to you and we drive on our trips to WDW. Our reasons?
1. We don't like the airport hassle. Where to leave the car, get there early, tight schedules, pack less than we can in a minivan, etc.
2. Perversely, we ENJOY the drive to Florida. We take the middle seat out of the minivan, plug in a little TV/VCR combo unit and we're off! The kids have movies, books, GameBoys, personal CD players, etc so we don't get too much of the "are we there yet?" nagging. I will admit, they still find time to fight but not nearly so much as I used to with my brother!
3. We like to have a vehicle while we are in Orlando. We go to Sea World and Busch Gardens as well as other Florida day trips. The cost of a rental car for a week is not cheap, even with the bargains.
4. I alluded to this in #1 above, but we like to overpack. Taking the minivan takes the guesswork out of packing....we just take it all!
I will say that now that we will be staying in our "home" with laundry facilities, the packing thing gets a little less critical since we won't have to bring as much clothing.
What can I say? We like to make like the Griswolds!