As he was again being calmed down, the man he had originally argued with came up behind him and king-hit him, Mr Masters said.
Wedding guests managed to get the man into the passenger seat of a car with the intention of driving him away, but the driver got out when he was punched in the face.
"The offender has then got behind the wheel, turned the car and allegedly accelerated into a group of people who had gathered to see what was happening. Most managed to get out of the way but three were hit. He then drove away," Mr Masters said.
Police searched the area on Sunday but the man escaped. A large number of people witnessed the incident.
Copthorne Hotel owner Shane Lloydd said the wanted man was not a guest at the hotel and was not a member of the wedding party. He could not comment further.
Police are urging the driver to hand himself in or contact Detective Patrick Derbyshire at Kerikeri police station on (09) 407 9211. With his birthday coming up on Thursday, the suspect may turn 21 behind bars.