We stay at BWV mostly, though also at BCV. We normally rent a car, but never drive to MK, because it's just not that easy to get to the gate once you park your car. It's our one bus ride on our vacation, and we just deal with it.
To AK, we always drive because it is SO easy: you park your car, walk a few feet to the tram, which is almost always waiting for you, then the tram lets you off very CLOSE to the gate.
However, the bus lets you off very FAR from the gate, and when it's time to leave the park, that hot walk to the bus stop is killer.