Turtle sanctuaries Vanuatu

Ive seen photos on various sites..Would love to experience seeing/touching turtles and the little babies. Ive heard of Coongoola Cruise which was rated poorly by one person, and Ive read a tiny bit of info in Tanna - White grass Resort.
Can anyone recommend which may be better. Im leaning towards Tanna as I want to see Yasur while Im there..
PS We are going end of Apr/early May 09

We were not very impressed with the Coongoola Cruise either but we really enjoyed visiting the turtle facility that is part of the tour. There are turtles of varying sizes and you do get to hold the little ones. We stayed next door to White Grass(Evergreen Bungalows) but were not aware of a turtle facility there. I would definitely recommend a visit to Tanna - Mt Yasur was the highlight of our 7 week SP tour - especially if you get to visit a turtle facility as well!