Todd Sligar was killed in 2016, along with two mates, when their car crashed into a tree near Trangie while they were returning to Orange after a hunting trip.

His sister Tanika Pintos told the launch of a police driver fatigue awareness campaign at the Australian National Field Days at Borenore on Thursday the family would never overcome their grief at his loss.

"I had a choice to sit and cry or to do something about driver fatigue," she said.

"We came up with driver fatigue awareness day, Be A Champ Stop for a Camp which means if you pull over and have a break and have a nap and arrive alive that makes you a champion.

"Todd and his two mates went hunting all night on May 22, 2016. On the 23^rd they attempted the long trip back to Orange with no sleep. At 7.30am the driver fell asleep at the steering wheel and crashed into a tree at Trangie instantly killing all three young men.

VIDEO: Family plea to young drivers

"They had full lives ahead of them instead a mistake of driving tired took their lives away. My parents' only son and my only sibling was gone. We turned our loss into a passion to save lives."

Mrs Pintos and her mother Michelle Sligar called on people to talk with their families and mates about the dangers of driving tired.

Rural Crime Prevention Team state co-ordinator Detective Inspector Cameron Whiteside said police and Transport for NSW would work together on the campaign.

Detective Inspector Whiteside said they wanted to raise awareness about the rise of fatigue among young drivers, particularly those on hunting trips.

He said young people who went hunting often drove 800 kilometres a night and needed to take breaks.

"No outdoor adventure is worth dying for," he said.

"A short 20-minute power nap could be all it takes to save them, their passengers and other road users from potential disaster."

He said people going on hunting trips needed to plan how they would travel to and from their destination, when to take breaks and who would be driving.

Transport for NSW Major Road User Safety officer Jacquie Anderson said in the past three years 78 people had died and 350 had been seriously injured in the region from fatigue-related crashes.