Campers still stuck on NSW south coast

A large group of campers are set to spend another night stranded on the NSW south coast amid rising floodwaters.

National Parks rangers are with the group of 16 adults and two children at the Bendethera Valley campground who have adequate food and water for at least two days, SES spokesman Dave Webber told AAP on Wednesday night.

"We're looking to send a helicopter there on a reconnaissance mission tomorrow to make sure they're OK and assess access to the site," he said.