THE NSW Game Council says minors hunting in parks would be strictly supervised despite concerns hunting will become a "free for all".

The Australian Workers' Union has raised concerns that children as young as 12 would be allowed to hunt in national parks with bows and arrows and guns after the state government agreed to allow hunting in some national parks.

The NSW Game Council chairman John Mumford said there was nothing new about minors hunting in NSW.

Mr Mumford has told ABC Radio minors cannot hunt on their own, even with a bow they still have to be supervised by an adult.

NSW National Parks Association chief executive Kevin Evans said allowing children to hunt in national parks was an "accident waiting to happen."

"I'm not sure if anyone would really see children with bows and arrows as a legitimate technique for reducing the problem of feral animals in national parks," he told ABC radio.

"We all know that children - even when supervised by their parents - can sometimes be a little difficult to control, so if you've got a lethal weapon in the hands of a child . . . you've got an accident waiting to happen."

NSW Public Service Association general secretary Anne Gardiner said it appeared the plan was about pandering to a gun lobby rather than controlling feral pests.

The PSA was concerned about the safety of its park staff, she said.

"When, not if, one of our members is injured or killed, we will be pursuing the employer, the NSW government," she said in a statement.