Some important helpful hints to make your travels worry free:
Remember you drive on the left in New Zealand...(keep the driver side by the centre line of the road).
Most crowded times on the road is during the school holidays (School Holiday Schedule) especially during the Christmas School Holidays when all New Zealand seems to be on holiday especially in the motor camps.
The Department of Conservation provides good campsites throughout New Zealand: DoC campsites
For anyone visiting for an extended period and traveling in a motor home joining provides very necessary privileges and information - New Zealand Motor Home Association