Hi, really want to book one of the Australia/New Zeland trips with or without the extension, don't want to book and then in 18 months time be told not going ahead due to min numbers not met, could you please tell me which is the most popular one and/or how many you have booked already (if any) because I know I'm really early, need to save best part of £10k so want to get organised. Many thanks, Jools