Looked at the store a few times, but never brought anything. The price difference between NZ and AUS are not that different. When I do decide to import I generally buy from US or Japanese stores.
The Aussie store I look at most often is http://www.campbellsprotackle.com
Whitebait Season starts 1 September 2026 and ends 30 October (inclusive). Chatham Islands: 1 December to the last day of February (inclusive)
