"We were fairly confident. The rugby World Cup's great - there's euphoria in the country at the moment about rugby. With Dan Carter's injury we need some good news,'' he said.
Prices ranged from $145 to $195 for an adult and $60 for a child.
Every year the tournament gets better and next year would be no different, said Walters.
Fans could expect new forms of crowd entertainment over the two-day event, which would be "another step up'' from last year, he said.
The tournament is the third on the IRB Sevens World Series and attracts 16 teams from around the world to compete.
It has gained a reputation of a mix of high class rugby and a fun party atmosphere with most of the crowd choosing to wear fancy dress.