We are travelling as a family of 8 adults to New Zealand for 10 nights in late October to celebrate our parents combined 60th's. Our parents are interested in the natural beauties of NZ as well as a short rail trip (O/Night to 3 nights). We are thinking to focus more on the south island, but would love to hear recommendations on where to go and what not to miss. We are also looking for group accommodations if anyone can advise on this. Thanks.