It's not just the big centres that have got behind the tournament in number, with a clash in Nelson between the West Indies and Ireland also in hot demand.
"They tends to be smaller grounds but they've got some really interesting fixtures," Walsh said. "It's some of those teams that capture the imagination and, with smaller grounds, I'm confident they'll all be full."
The grounds that were unfamiliar with the demands of the international game would be the focus for organisers in the coming 100 days, with logistical issues like temporary seating and signage needing attention to ensure the venues reached the required standard.
Security was another issue and, after Prime Minister John Key this week said the World Cup could bring an increased terror risk, Walsh was confident the event would be ready to deal with any threat.
"With major events there's always the perception of increased threat around security," she said. "There's actually nothing from a fan-facing perspective - there will be nothing different that we're not used to as Kiwis from a Rugby World Cup or a normal ODI perspective.
"In the background we continue to work with agencies and police and the ICC to understand any specific threats, of which there are none at this stage. But it's a watching brief - if something happened between now and the tournament, that might change. But at the moment it's just business as usual."