Adding another data point;
We have used Native Way several times with only amazing results.
http://www.nativewaywatersports.com/our-tours
This tour I highly recommend; Sting ray, snorkel, star fish beach.
This tour usually feels like a private tour, at least in the fall.
We have had 4 - 8 extra people aboard during the fall. So it feels like a private tour almost.
IOW one other family of 4 aboard, at times two families of 3-4 aboard.
In the summer it can have twice that crowd. So, .... what 16 - 20 pax. lol
The
DCL boats have close to a hundred.
These folks will take care of you.
No worries booking outside of DCL. They know the times, they also know the time zones better than you. lol
They will also drop your group where requested, along the "way" back to the pier, outside of the tour if requested.
They offer flexibility in the schedule. (Visa Moment)
IOW we have had great experiences with this group over the years.
JME
There is also this helpful resource regarding GC;
http://boards.cruisecritic.com/forumdisplay.php?f=147