We plan to arrive on 8/29 and made arrangements through Olivia to pre-extend our stay (if pre-extend isn't a word, I just made it one!). First, I contacted the hotel (Mauna Lani) and they quoted us a rate but could not guarantee the same room we were already booked into beginning 8/30. Then, we contacted Olivia and they booked us for that night (Friday night, 8/29) at the same rate we were quoted by the hotel for our room (well, Olivia was actually $2.00 less) and, they booked us into the same room we're staying in for the week so we won't have to move. So if planning to arrive early, I recommend you contact Olivia and see what they can arrange for you.
Bet & Michele