Hi Avocet,
At the moment there are 3 people booked on the 12th May departure and none on the 7th July departure. The maximum number is still around the 25 mark.
Usually this tour is fully booked or has a very limited availability, and we expect our 2016 departures to be the same. So of course, its hard for us to say what the minimum number would be at the moment.
Kindest regards,
Monty