Queenstown police area response manager Senior Sergeant Glenn Wilkinson said the hired motorhome was stopped near Fairlight on Saturday while travelling at 106kmh.
The driver and front-seat passenger were wearing seatbelts, but the other six occupants, including a 4-year-old child, were sitting on a bed, Snr Sgt Wilkinson said.
There was a child’s car seat in the vehicle, but it had not been used, and the group told the officer they had driven from Auckland in that fashion.
"There were not enough seatbelts for them in the vehicle."
The officer, who drove three of the group to Queenstown to make alternative transport arrangements, issued them infringement notices for speeding, failing to wear seatbelts and failing to ensure a child was restrained.
Motorhomes are classified as heavy vehicles in New Zealand and restricted to 90kmh on open roads.
Snr Sgt Wilkinson said police encountered similar situations "reasonably regularly", including people travelling in caravans.
• A man whose licence had been suspended for 28 days when he was caught driving at 145kmh near Tarras on Friday was caught speeding again near Queenstown the next day.
He was charged with suspended driving and his vehicle was impounded.
The man will appear in the Invercargill District Court later this month.
