Cowper has been building the tracks at his Turakina property since Christmas in preparation for this month's event.
He started carving out the courses while the ground was still dry. "We've had to raise a lot of dollars to do it. The filming is a major cost."
It will feature 15 trucks completing six different courses which will include man-made jumps, sculptured walls of death, ramped hill climbs and descents, dug out humps and hollows, mud bogs plus a speed course. "It is made for TV. It's not like circuit racing where you watch the same track all day," Cowper said.
Cowper has hand picked the 15 drivers who will take part in the event with crowd entertainment in mind. "I've picked guys that have got good machinery and who I think will put on a good show.
"It's not really about results."
He said it was an exciting change for the sport and hoped it would be one that pulls spectators in.
The May 31 event, held at 2278 SH3 Turakina, starts at 10am and will finish at 4pm. Entry will be $20 per person but is free for kids under 5. Cash only. Hot food and refreshments available on the day.