The New Zealand Mountain Film Festival in Wanaka is now a keenly anticipated annual fixture and attracts visitors from as far away as Auckland and Australia.
Planning is also under way to expand the festival and create a charitable trust to run it in the future, Mr Sedon said.
"When we started it, I didn't think about the future of it. We just thought we would run it for a year and see how it went. If enough people came and supported it, we would do it again," he said.
After each festival, the couple asked themselves whether they were sick of it.
But strong public support, coupled with an addiction for adventure, fuelled their passion to keep going, Mr Sedon said.
"I am a bit of a cynic about the way New Zealand likes to blame someone for something that goes wrong. For example, a kid might break a leg at school so the school gets blamed ... But I want to keep the passion for adventure alive and not focus so much on being a safe society," Mr Sedon said.
That does not mean he believes in recklessness. But he believes people should be willing to take risks and follow their dreams, even if there are risks.
"I've paid the price for adventure with my knee but I still do it," he said.
The Adventure Consultants mountain guide is nursing his knee after surgery to repair damage caused by a kitesurfing accident in March.
He would rather be kitesurfing in Peru with friends this week but instead he is at home doing four or five hours of rehabilitative exercise a day.
"I think you call that possessed," he laughed.
In November 2009, Mr Sedon was nearly felled by a brain aneurysm and required emergency hospital treatment.
He quickly recovered and has had two trips to Nepal and another two to the Antarctic.
His latest expedition was in February, when he and a group of Otago adventurers sailed from Argentina to the Antarctic in a 18m sailing yacht and went ski touring on the frozen continent.
"That was an amazing adventure. We had some trouble with the boat coming back. That was a bit of an epic. We were racing a storm. One engine had blown out and I woke up to sails flapping. We had to put harnesses on in the middle of the night over a massive ocean and try to get the sail down," he said.
The group continued to race the storm on one engine and with a damaged mast but the drama was all for nothing. The storm did not come about.
Mr Sedon believes everyone defines adventure differently so everyone can be an adventurer.
"It doesn't have to be a hardcore one. For some, it is going for a walk somewhere new. It's about not getting wound up with our busy lives ... There is risk in life. A lot of people get caught up in being successful and having lots of money but to me, the most wealthy people are those who take the time to get out there and have a good life," he said.
This year's festival introduces two new elements: an adventure-film school and an adventure-film-editing competition.
The one-day film school will be run by Kendal Mountain Festival founder Brian Hall, of the United Kingdom, who recently moved to Queenstown.
The editing competition will be judged by Dunedin film-maker Wayne Johnson. Entrants will be provided with the same footage next month and have a week to prepare their films.
The main film-maker's competition has already attracted 50 entries from around the country and overseas and another 70-80 are expected by the deadline on Monday, Mr Sedon said.
The speakers programme includes Emmy Award-winning US adventurer, film-maker and writer Greg Child; adventure racers Debbie Chambers, of Auckland, and Steve Gurney, of Christchurch; and Lake Hawea climber Lydia Bradey.
A world-record dyno attempt (a climbing wall jumping competition), workshops, art displays, live music and an adventure trade show round out the programme.
Tickets for the July 1-5 festival go on sale on Wednesday.
