Post mortem examinations will take place this morning in Christchurch on the four of seven bodies that have so far been recovered.
Families of the victims were expected to arrive at the glacier at some point, but travel arrangements were still being finalised.
Queenstown pilot Mitch Gameren, 28, died alongside six tourists when the Alpine Adventures helicopter he was flying on a scenic trip plunged into a deep crevasse in the glacier.
The tourists were Andrew Virco, 50, and his partner Katharine Walker, 51, of Cambridge, England; Nigel Edwin Charlton, 66, and his wife Cynthia, 70; and Australians Sovannmony Leang, 27, and Josephine Gibson, 29.
Transport Accident Investigation Commission spokesman Peter Northcote said investigators had spent yesterday conducting formal interviews with people connected to the tragedy, while waiting for the weather to clear to resume site operations.
"These include employees of the operating company and others working in the same area on the morning of the accident. Documentary evidence has also been gathered," Mr Northcote said.
"Meanwhile, an engineering expert for the helicopter type has been preparing equipment to assist with securing the wreckage while police operations take place nearby, and to prepare it for recovery.
"Planning of a drone aerial survey mission has also continued working off existing photography and an investigator's aerial reconnaissance of the wreckage scene.
"The investigation team's current priority is to secure all available physical evidence and to obtain witness statements.
"Once this has been achieved the team will be able to confirm any additional external expertise that might be required to help with examination of the wreckage and other technical aspects as the investigation continues."
