Great analysis by Denny and Erica. I'll just add one point... Take money. Lots and lots of money! We were leaving Tahiti for a few weeks taking in Moorea, Huahine and Bora Bora before heading through the rest of the South Pacific towards Australia. Our supermarket cart came to over around US$450 (back in 2010) and there was no alcohol included in that. Just basic food supplies for two people for two to three weeks.

The Society Islands are a really great destination and you will have a wonderful time. Very jealous.