Married life in a tent. How do they do it?

Could you spend 16 hours a day trapped in a vehicle with your husband? Road trips have left many a relationship in tatters, but for Beverly and Dereck Joubert -- the wildlife filmmakers profiled this week on 60 Minutes -- spending long days together in a truck and nights in a tent is just part of the fun.

"We designed our lives so that we could be together," says Dereck. "We never wanted the life where I would go off to the office and come back late at night, cranky, have a scotch, and spend an hour or two with Beverly, who had a completely different life."

Snake bite! A 60 Minutes shoot in Botswana

So, these high school sweethearts moved to Botswana and began making their dramatic wildlife films together. Beverly and Dereck work in isolation, going months without seeing other humans; and they told Lara Logan that four days is the longest they've spent apart in years. And they're still married!

What's their secret? In the above video, Dereck and Beverly discuss how they make their marriage work while living in the African bush.

Photos courtesy Beverly Joubert