There used to be a "transfer to motu" excursion, but it appears to be gone, wish it was still there, I'd do it for sure.
I'm betting if you ask over at tahiti-explorer.com, on the boards, you can get an answer about tours from the dock. I'll also look in my guide book at home, which is a different one.
I couldn't imagine renting a motor boat unless you were really experienced with boating in that kind of environment. Easy to ground yourself in a reef!
