You can't stay in the middle if you're in a standard room. They're only for castle club.
We have been in the wing with the lobby in both time so far.
This trip we were in room 1001 (King Terrace room) and it was fab. 12 seconds walk from the lobby but still really quiet.
I emailed and asked for a nice room as I didn't have any location preferences. I don't think you can really go wrong in any location.