Hi Bob,
Great question - we haven't reduced the group sizes for 2017 and we are not holding any availability for a later release. We have just had a jiggle around of the numbers for the main tour and the add ons, for a couple of 2017 holidays.
For the Untold Cambodia & Laos tour, we offer 8 spaces for the departures in 2016 too and in fact we have actually increased the size of the add-on group for 2017, which takes the group size up to 18 people. For the Mysteries of Mexico, Guatemala and Belize tour, we are still offering 20 spaces, but again, we have increased the add on group size from 7 to 10 spaces.
I hope this clears up any confusion.
Kindest regards,
Monty