"We've been involved with the community for a long time and that directs what we do - we do whatever it takes to keep our people employed.
"The staff are locals - we know them and they are good workers with skills that we want to hang on to."
It also allows Harrisons to develop vehicles specifically suited for a tourist operation up and down Ninety Mile Beach, including super wide tyres as well as stability features.
"The buses are checked by an engineer to make sure they can handle the conditions - passenger safety is a major factor for us," Ms Harrison said.
Harrison Cape Runner Tours depart from Kaitaia for Cape Reinga at 9am daily and return at 5pm.
As well as tourism, the firm also run a "hospital bus", doing daily trips from Kaitaia to Whangarei, apart from weekends.
The company, which contracts out its services to other industries around Kaitaia, employs 18, including sons Craig and Tristan.