So, I emailed Windstar and received this reply - this might be helpful for others planning their own excursions but do note locations may change due to conditions..
Embarkation beings in Papeete, Tahiti,
Address: Papeete Cruise Passenger Terminal.
Quai des Paquebots – Epis Nord or Epis Sud
Papeete 98714
French Polynesia
Fakarava, Tuamotu
Address: Rotava Harbour
W9VH+CVC, Fakarava, French Polynesia
Rangiroa
Address: ANCHORAGE INSIDE THE ATOLL, Finger pier TIPUTA
14° 58.452 S - 147° 38.502 W
Motu Mahaea, Taha'a
Address: anchorage Tahaa lagoon - call to private Motu: Motu Mahaea - Anchor between Motu Mahaea and Baie Faha’a. Zodiac runs to small wooden landing stage on Motu. Tender runs for one tour to the quay inside the small ferry harbor in the village of Faha’a at the head of the bay.
-16.633, -151.493
Riatea
Address: Port of Uturoa
Uturoa, Raiatea
French Polynesia
Bora Bora
Address: Harbor of Vaitape
BP 9164 Motu Uta
Papeete 98715
French Polynesia
Huahine
Address: tender landing : Débarcadère de MAROE (landing stage Maroe at Maroe Village)
16° 45.450 S - 151° 00.000 W
Moorea
Address: tender landing to tender pier at Cook's Bay / PAOPAO tender landing
17° 29.803 S - 149° 51.453 W