Premise: I had a 15 kg Hall anchor
(15 m chain, 25 m rope), so anchoring was quite safe with a 22' boat.
1- west of the motu de la passe (as well as other yachts did);
2- in front of the La Pirogue hotel
3- east of motu Tao Tao.
4- Haamene bay.
Anyway if you consider the tradewinds direction, to spend the night I would suggest to anchor
just west-northwest of the motu de la passe (east of Tahaa) and Tapuamu bay. In Haamene Bay and motu Tao Tao the sea was a bit rough and shoopy.
Last remark: the locals told us "not to leave the boat inoccupied" in Tapuamu bay, since there could be larcenies (stealings). So we decided even not to anchor there.
seemed too good to be true!!!