We stayed in Casitas 3 a couple of months ago, and while it's not what I requested, I couldn't have been happier with it. It's a very short walk to the lobby/food court. Short enough to whereI typically didnt mind to walk from the room to refill my mug after a day at the parks. Also, the bus stop for this section is the first bus stop they stop at, so while you do have to sit on there as it loads the other resort stops, you are basically guaranteed a seat, AND your stop will be the first stop coming back from the parks.
We didn't pay for a preferred room, so I don't believe this one is. But I wouldn't know for sure. Buzz above would.