Police investigating the death of Adrian Humphreys are appealing for sightings of his vehicle as he travelled between Rotorua and Tāngarākau.
The 57-year-old was found dead in Tāngarākau on May 7.
A homicide investigation was launched after his body was discovered at a campground.
Detective Senior Sergeant Gerard Bouterey said the investigation team had been working to establish Humphrey's movements in the days prior to his death.
"We believe Adrian left Rotorua at around 7.30-8am on Friday, May 6. He arrived in Taumarunui at around 10am and departed BP Taumarunui at 10.15am."