He managed to land the helicopter nearby and flew the grateful women out of the bush to waiting paramedics.
Earlier in the week Mr Diedrichs and his crewman Mr Hansen located hunter Don Stevens, who had broken his leg but dragged himself to a location where he could be picked up.
Unable to land, the helicopter hovered while Mr Hansen hauled Mr Stevens' 90kg frame into the helicopter. He described it later on social media as one of his more challenging rescues.
"He was a happy man once we were heading out.
"The bigger helicopters have their place. Knowing the hills was the difference, just glad we could help out."
Mr Stevens later thanked his rescuers via the Wairarapa Times-Age in an interview from his hospital bed, saying they did an "absolutely amazing job".
Wairarapa Facebook posters have heaped praise on the crew.
"Well done, Jas, you are a legend!" said Bridget Gane. Jason Pye posted people might as well call the local helicopter firm before anyone else.
"How many times has JD [Diedrichs] been called up when the going gets tricky?" asked Roger Barton.
Mrs Lloyd's brother John Schumacher expressed his "tear-filled gratitude" to the helicopter team, as well as "the amazing police staff, search team members, dog guides, volunteers and news teams who kept us informed and everyone else involved who worked so quickly and effectively to find -- and save -- my sister and niece.
"What a testament the wonderful citizens of New Zealand are to the rest of the world, of how people can work together to accomplish such noble deeds. Thank God, and thank you all."