"It's going to be weird, I've only ever travelled with Kane, my older brother, on a rugby trip, but I'm looking forward to it."
Barrett's form when taking over the No10 jersey from the injured Aaron Cruden this year halfway through the Rugby Championship has been stunning, but his kicking for goal remains a work in progress.
He missed all three of his shots at goal in the 37-10 win over the Wallabies at Eden Park as the All Blacks extended their winning record to 18, the first time a tier one nation has done so, and he was replaced by Cruden shortly after halftime.
Barrett said he wasn't happy with the situation - "No, I don't think anyone would be happy with that," he said.
"I'm striking it well in training. I'm working to find the issue - if I knew the issue it would be easy."
Asked if his follow through was one of the things he was working on, he said: "That's one part I'm always working on or thinking about, yes."
His opposite Bernard Foley missed two relatively easy shots in front during the test, but Barrett said conditions weren't to blame.