Police plan to set up a base in the Haumoana Domain on Sunday to try to get more information from the public about Pierre-Antoine Paludet.
The French tourist has been missing for a week.
It is believed Mr Paludet arrived at Haumoana on January 10, and parked his car in a carpark near the rivermouth.
He slept in the vehicle and cooked nearby, but has not been since about 6.30pm on the Friday two days after his arrival.
Locals became concerned after they noticed rubbish gathering around the vehicle, which appeared to have been abandoned. The 32-year-old's belongings appeared to still be inside.