Hi Linda:
We did not make an on-line reservation and had no problem making them in the morning for the same evening. We also enjoyed the cooking demos, and it was fun to see how the meals turned out.
We enjoyed Agnes in La Veranda and Ivan at Le Grill. La Veranda was a bit more French traditional, and the Le Grill seemed to have a bit more local fish.
With respect to the Bora Bora Motu, I think if you swim a hundred yards or so there will be plenty to see. You can also walk up the beach toward the outer reef. Also, we heard bugs were a problem, but we only used spray once. Even the Marquesas were no problem. I suspect this was a bit unusual.
I am not sure how to post pictures in this response, so I will e-mail you a shot of the PG from the motu. You can see that the water is quite calm.
Cheers,
Dan