Well there you go, the Korean Central News Agency (that's north) has reported that:
"A friendly meeting took place at the Korea-New Zealand Friendship Haksan Co-operative Farm in Hyongjesan District, Pyongyang, on March 22 on the occasion of the fifth anniversary of the establishment of diplomatic relations between the DPRK and New Zealand. Present on invitation were members of the visiting New Zealand-DPRK Association. On hand were members of the Korea-New Zealand Friendship Association and officials of the farm. The guests helped farmers in carrying compost. They appreciated an art performance given by farmers and talked with them about the need to boost the relations between the two countries, deepening the friendship. They handed aid materials to the farm. "
You will hear this on Voice of Korea radio in English on shortwave today only in the news (no there is no way to listen online). Presumably the NZ-DPRK Association didn't ask about the children of political dissidents being kept in gulags, they prefer to carry compost - which wouldn't be hard to find, given that virtually everything ever published in the country is worth less than that. It would have been more helpful had they been able to hand radios to the farmers so they could find out how much they are lied to by their government.
Still, these are private individuals, not government and it is not for me to ask why they provide propaganda for a regime that is the antithesis of reason and life itself.