Overcrowding and hygiene issues have led to Genesis Energy banning all freedom camping on land it owns at the Tokaanu Marina on the southern shores of Lake Taupo.
The company has erected signs stating that camping and overnight parking in the area is strictly prohibited.
Genesis public affairs manager Richard Gordon said Genesis has always provided access to the boat ramp and maintained a parking area for boaties. The boat ramp is maintained by the Taupo Harbourmaster. Mr Gordon said the company initially supported the concept of some camping and extended the parking area with provision for a maximum of up to eight campervans for one night stays. Signs also directed campers to a sewage dumping station that had originally been installed for boat owners.
He said problems had arisen in recent years with conflict between boat owners and an increasing number of freedom campers.
"In the last couple of years up to 18 to 20 camper vans have been parked up three deep, spilling over to the boat trailer parking area.