I agree with snowy76: bus service at AKL was good and relaxing.
I drive a car to the parks when: 1. I want to park hop on the same day. 2. I am not planning on staying til the ending event at a park (Ie Wishes, Illumninations, Fantasmic).
I've driven around WDW enough to feel very comfortable about my directions and where I am going. If I needed to use a map, I would feel a little more uncomfortable driving.