Hi Cindy
At the moment these excursions can only be paid for in cash while you are away. It's possible that this may have changed by the time you go so have a look at your final information before you go. It should be easy enough to withdraw cash in New Zealand, as you will find plenty of cashpoints in the big cities.
We haven't appointed a tour manager yet but I should be able to tell you by November.
As for the food, I know some countries have strict rules about importing meat and vegetables and other perishables but I'm surprised you've had any trouble taking dry food on your travels in hold luggage. I've always brought packets and jars back from my holidays without any trouble.
Kind regards,
Olly, your editor