Hi Dyuti,
Sorry for the delay in coming back to you but hopefully the following information will help...
My colleague has explained why we only take payment for some of these excursions when you are away rather than from here in the UK.
The Rainbow Springs and Walter Peak cruise excursions are in resort only as they cross over with other excursions that travellers may or may not have booked. The Jet Boat ride excursion is in resort only as this is quite a fast high speed ride and it is good for the traveller to speak directly with the Tour Manager before booking.
The following excursions are weather dependant and will not always operate. These three excursions can be paid by credit card: Mt Tarawera Floatplane/Helicopter, Glacier Helicopter, Mount Cook Flights.
I have been advised that if there are any excursions that you would like to take that are bookable in resort, there are plenty of ATMs if you would prefer to withdraw cash while you are overseas rather than taking it with you.
For the afternoon tea (or a SIngapore Sling) at Raffles - the Tour Manager would be able to organise this for you. The team are looking at whether or not we will be able to offer this as an optional excursion in the future, but it would be more likely for 2018 departures.
Kindest regards,
Julia