In response to some "pretty silly and unwise" actions from MP Harete Hipango Luxon said his expectations of caucus were "crystal clear ... about the standards we expect".
"People are much more fixated and interested in New Zealand at the moment around inflation and why they're going backwards with the cost of living going twice as fast as their wages," he told reporters late last week.
It will also be Judith Collins' first public showing alongside her caucus colleagues after losing last year's confidence vote, and the leadership.
Improved performance and a sharper focus in each portfolio will be the main messages over the two-day retreat, with Luxon wanting to draw a line under the past few years.
"Our job is to make sure that the team is firing, people are focused on what they need to do and opposing the government, as hopefully you've seen in a constructive way around rapid antigen tests ... but equally also proposing ideas for the course of the year."
National goes into these two days with an encouraging, if not spectacular, showing in the 1 News Kantar poll, including Luxon's results in the Preferred Prime Minister's stakes and his approval ratings when lined up against Prime Minister Jacinda Ardern.
