Campervan tourism has been estimated at being worth almost have a billion dollars to the industry.
The figure of 486 million comes in a report by Tourism Holdings.
It includes spending by domestic and international travellers.
According to the report, international visitors hired 53,710 campervans during 2011, staying an average of 16.8 days and spending a total of $447.9 million in New Zealand.
Domestic residents hired a total of 10,220 campervans during the same period, staying an average of 8.9 days and spending a total of 38.1 million outside their home regions.
The magnitude of the industry is being described as phenomenal by Tourism Holdings CEO Grant Webster.
As well as the money you'd expect such travellers to spend - on campsite fees and fuel - they spread their cash over restaurants, other transport and other accommodation.