Hello Avocet,
I can tell you that the group sizes for these are listed as:
Namibia up to 25 travellers
Untold Cambodia & Laos up to 18 travellers
and Calabria up to 25 travellers
In terms of the new brochure - between you and me, it will be with you towards the end of December.... and, it would be wrong of us not to give you a clue or two about our new tours before they launch!
Kindest regards,
Julia