"You have to think about taking the right lines with rocks that you don't normally have to consider on a slalom course and we're in the middle of this massive gorge so if something goes wrong, you're on your own," Clarke said of the camp."
All that focus paid off this week in Rio with a dream final run.
"I wanted to build through the rounds. I had a very good qualification, second (in the heats) and third in the semifinals and then I knew that at the right time it would come naturally.
"I kind of just held it all together and came away with the gold medal."
Dawson was delighted for Clarke, while he was also pleased to improve from his 15th-placing at the 2012 Olympics in London.
"I was so happy to be in the final and get the opportunity to race - it was a high-quality field and it was humbling to be a part of it," the 29-year-old said. "It was the first time I've put together four clean runs in a row, which was pretty surprising."
As well as his Whataroa trip, Dawson made headlines this year for other unique facets in his buildup - he produced a cookbook to help fund time on the Rio course and also launched a campaign to help feed the homeless in favelas around the venue in recent weeks.
"I'll be back here tomorrow to cheer Luuka Jones on - she's in pretty good form so it will be good to see how she goes."
Clarke is hoping to head back to New Zealand for November's inaugural WhitewaterXL event at the new Vector Wero Whitewater Park.
Newly-crowned Olympic C1 champion Denis Gargaud Chanut (France) has already confirmed his attendance, with Dawson, Jones and 2012 Olympic silver medalist Vavra Hradilek acting as event ambassadors.