The idea is to interview the full range of those involved at the time - the occupiers, including people who were children at the time and are now in their 30s, and people from churches, the police, the council, neighbouring properties and the media.
Parts of the interviews will be turned into print, and some may also be filmed.
The working group is drawn from the Wanganui District Council, the city's museum and library and from Whanganui Maori. The idea came from treaty educators David James and Jillian Wychel, both QSM, who are also involved, as is Putiki's Huia Kirk.
Exactly where the finished resource will be held is still to be decided. The group has been debating intellectual property issues.
It already has seven Maori and seven non-Maori interviewers lined up for two days' training by the Turnbull Library Oral History Archive staff.
Each interviewer will be expected to do up to 15 long interviews. Those will be unpaid, but there may be some payment for making the printed extracts. The training will be fantastic, Mrs Hovey said, and could help interviewers get other paid work.