Your bigger problem is getting to Tahiti itself. United does not fly there. You would have to get lucky and try to find award availability from lax to akl then to ppt on Air New Zealand, in many cases it isn't there or if it is it requires two awards.

Many hotels in French Polynesia will not offer a standard award over water bungalow. In the case of my honeymoon.

I and my wife obtained 3 american airlines cards each for 50k sign up bonuses for each card and we are flying round trip business class from IAD to PPT connecting in LAX. We then used Hilton Points to stay at Hilton Moorea and Bora Bora, and paid cash to upgrade to the OWB. There