"Door knocking does actually work," said Ms Crankshaw, originally from Johannesburg.
"We've generally had a positive response - people have stood on their doorsteps and asked us all kinds of questions.
"They don't always accept our message, but they've shown us real courtesy."
"We do get people who shut doors or walk away - but it's so rewarding when conversations happen," said Ms Woodbury.
The women applied to do mission work through their respective churches, where their leaders prayed for "a revelation" of where they would serve.
When New Zealand was revealed, they were "excited" - thanks to their love of Lord of the Rings and rugby. They have served in Hastings, Porirua, Christchurch and Westport - doing evangelism and community service, such as gardening and volunteering with Riding for the Disabled.
Ms Woodbury says she has particularly enjoyed the New Zealand scenery, learning about Maori culture, and the laid-back, "family oriented" feel of Wairarapa. Ms Crankshaw says she has grown from her Kiwi experience - and has learned to ride a bicycle in formal attire as a bonus.
"We usually bike, as it's a good way to interact with the community.
"It's not safe to bike in South Africa, so this was the first time I've ridden from A to B.
"Biking in skirts has been interesting - but it's got easier."