Now vandals are threatening to force the 37 members of the Northern Area Contest Aeromodellers (NACA) to move their operations due to rough surfaces caused by reckless driving.

NACA member Paul Gibson said club members, mostly Port Stephens residents, had been having problems with vandals for some time.

"We fly electric-powered planes and helicopters and un-powered gliders. Vandalism has been a factor for us for many years," Mr Gibson said.

"Gates and installations have been destroyed and material stolen. We estimate more than 20 vehicles in the past eight years have been left either abandoned or burnt.

"It has become so bad that we have lost some members because of the damage caused to these expensive planes by the rough surface."

Mr Gibson said the four-hectare piece of land, once used by the Department of Defence Force as a drop zone for parachutists, is ideal for model planes and gliders because it is flat and remote.

"The recent vandalism is predominantly the result of rogue motorbike riders, quads and four-wheel-drivers.

"The ground is soft and therefore easily damaged, which obstructs our take-off and landing areas."

Mr Gibson said club members had discussed their concerns with police, the Department of Defence (owners), Parks and Wildlife (managers) and the Water Board, but there was very little that could be done unless the culprits were caught in the act and identified.