I did this trip in March/April this year. Take layers, hat, sandals, trainers, wet gear and sun cream. Smart casual wear is fine for the evening. Most of the hotels have laundry facilities and iron and ironing board and selection of toiletries in room. Lots of time spent on coach so comfortable day time attire essential. As for money, I took NZ dollars, debit and credit card. Make sure you go on all the extra trips too - expensive but worth it! Have fun.