My personal opinion is either Samoa or Niue, ground floor. If you can call and put in a request for ground floor Samoa facing the main pool it would be ideal...but those rooms are in high demand. Both those longhouses are close to the GCH, close to the main pool, and a shorter walk to the TTC than some of the longhouses on the west side.
However, I don't know when you're arriving and/or when demolition of the quiet pool will start, so with the little ones if they're busting concrete during your stay then it will definitely be a problem for mid-afternoon naps.