We have booked a holiday to New Zealand for 23 days in September. We plan to spend about 10 days in the North Island and the rest in the South, when we get to the south island we thought we would stay in Nelson for a couple of nights and then travel down either the west coast or the east coast and just wondering what the recommendations would be. We also want to do Arthurs Pass and Akaroa then on to Wanaka where we will meet up with our son who is working the ski season there. Any and all suggestions will be welcome for both north and south island. We are using a rental car and hoping to stay in self catering accommodation where possible.