The Department of Conservation has closed the Catchpool camp site at Remutaka Forest Park after about 70 anti-vaccine mandate protesters arrived on Thursday evening.
A DoC spokeswoman said staff were liaising with community leaders, who were encouraging and supporting people to return home from the camp site, 34km east of Wellington.
"As a public safety precaution, DoC has temporarily closed the camp site to the public and is controlling the gate to prevent any further arrivals. People can still access walking tracks and huts in the Orongorongo Valley," she said.
The spokeswoman said so far the group has been well-behaved, respectful, and had paid campsite fees.
"We are working with local police to ensure the safety and well-being of our staff and visitors," she said.