Private tours?

Anyone have any good recommendations for a private tour of Bermuda? Many years ago we did a sightseeing tour on a bus, which was nice, but stopped at the caves and perfume factory. I would rather a more personal expereince. Has anyone done this?

Friends on our cruise did this and had a great time. I believe they picked one up right at the dock. I'll try to find out how much and how long it was.

Update: Our friends went for 3 hours and it was $120. It was 2 couples so it was $60 per couple plus a tip. I don't know if it would have been $60 total if just 2 people went or not. It was also a Sunday which it seems everything is more expensive, ie. taxis.