We did a tour of New Zealand.We planned it all ourselves,decided which places we wanted to visit and booked most of the accommodation on line before we went.We also booked internal flights with Air New Zealand before we went so we were able to travel about without driving too many long distances.We stayed in most areas for at least 3 days and had a great time.
Just remember that if you use internal flights to check the luggage allowances as these are much less than on International flights.We booked places with washing machines so were able to travel light and this also made travelling around much easier.