I can't address your concierge questions, but we just returned from the AKL with 5 of us in the room.
With 5 in the room, you must either book a concierge room or a Deluxe Savanna View room. All of the deluxe rooms are on the 5th floor. We had a queen bed, a set of bunks and a day bed. The rooms are a little bit bigger than the standard rooms. Concierge rooms are the same size and are on the 6th floor and some on the 5th floor.
We had stayed in a standard savanna view room last time and were on the second or third floor. We found the view from the lower floors to be better, since we were at or below the tree canopy, while on the 5th floor, we could not see anything that was behind the trees. But the view was still great and I doubt if we'll ever stay at another resort - we love the AKL.
The concierge service does allow you to book the Sunrise or Sunset Savanna tours. Although we didn't do either of these, other guests we spoke with raved about them. Maybe next time we'll try one of these tours.
Hope this helps.