Originally Posted by WineCountryUA

Unless you have *G status, lounge at just MEL and BKK. Non-status access is based on departure flight cabin.
These are departure lounges

The Check bag allowance is up to NZ , many airlines will take in account the later business class but it is an airline by airline decision. No *A rule.
The cabin allowance will probably be NZ economy carryon allowance (not business).
Both should be check with the folks in the NZ forum.