It's all driven by chef Grootelaar, whose European experience seems to revolve around the truffles season in Northern Italy, each October and mirroring other harvest festivals around the World. One of them is the Alba festival, home to the most-prized white tuber truffles.
There is even a "university" to train the sniffer-dogs necessary to locate the truffles in forested areas, and anything up to a metre beneath the surface, and there are universities still trying to figure what triggers the growth of truffles.
Munckhof says no one knows what triggers their growth, but they use a bit of calcium phosphate and wait for the results.
Aroma and size are what counts, and perhaps the most memorable moment all-round was two years ago when the visitor from Central Otago struck the Puketapu gold (aka "a very nice truffle").
"It brought tears to her eyes," both Grootelaar and van Munckhof recalled. The aroma, says Munckhof, made everyone stand up and take notice.
There were some anxious moments in the weeks beforehand. Original sniffer Bear had passed away, and "Houdini" canine Teddy departed in a misadventure just three weeks before the first of the Truffle Heaven experiences earlier this month.
Van Munckhof and Hutchins say a friend's dog, Chika, has proven a more than handy substitute at short notice, while they train young Rua for truffle duty.