I took the family to Mana Island.
It was a good spot for the family and had south and north facing beaches so you could kite 360 Deg wind angle. Also the family could hide on the other side of the island and avoid the wind if need be.
I don't think its in the perfect spot to grab the most of the trade winds. But it suited my needs of family fun and then a bit of kiting on the side. If I did it again I'd take the foil and blast between islands with the family chasing me in a boat.