SQ generally default all meals on a flight to selected special meal, so you could try choosing BTC first and then the special meal for refreshment.
One disadvantage of choosing BTC vego option is that you are stuck with the inflight menu for starters and they generally dont have any meatless...
Your best bet would be to carry some AUD that you can exchange at the airport (small amount to cover immediate expenses).
You should find plenty of money changers out in the city.
But be sure to have some cash before going away to the rural wedding.
Lot of India now accepts digital payments...
Does QF release last minute F awards. I see a few dates in the next few weeks with F9 A7 (only 3 seats occupied in seat map on EF). will this translate to last minute award release?