Changing Money for Tahiti
What is the most cost effective way to change USD?
Bora Bora Island Guide
Converting money either before you arrive or at the airport when you arrive in Papeete will give you a better exchange rate than at your hotel. The rate at LAX will be the worst.
A good option is to contact a bank in your hometown a couple of weeks before your trip and tell them the amount of Pacific Francs you need. It can take a few days for them to get the money in, and then you can pick it up. A bank's exchange rate is often only a few dollars no matter how much you exchange.
Hope that helps!