Hi cfreading,
So with all the variations the most that we will take is 35 (the number of seats on the coach). This will include those taking the main tour only, the add-ons and extended stays.
At the moment there is one traveller booked for January 2016.
I have just spoken to one of my colleagues in the service centre who have advised me that if you book the main tour only and wish to change to the Australia with Dubai stoppover tour then subject to availability this would be possible. We would recommend that you decide before the middle of the year - not only as the tour is subject to availability, but if flights have to changed after they have been confirmed, this may incur a supplementary charge.
I hope all of this helps.
Kindest regards,
Julia