"It's been pretty much the same course for five years now so just about everybody knows what to expect before they get here," he said. "Obviously it's always nice to be competing at home but, no, there is no advantage in it."
Mason does admit, however, that the nature of the course with its narrow roads and tight turns does suit his style of driving.
"It's more about handling and cornering rather than straight speed, you need to always be aware of getting your lines right," he said. "You have to stay focused, one mistake and it can be all over."
Mason will be one of four drivers contesting this weekend's rally who have won the national championship title. Chris West, Geoff Argyle and Dean Summer have also tasted success and will be amongst his main rivals.
As is Alex Kelsey, the Coromandel driver who was the surprise winner in Whangarei and who as a result, will be first out on the roads tomorrow.
"He [Kelsey] has the bit between the teeth and you can't under-estimate him, he could be the dark horse again," Mason said. Spectator information is at rallywairarapa.co.nz and live results will be posted online at chrissport.co.nz.