The trip was a once-in-a-lifetime experience for the couple, who met in art school and spent six years saving money and planning their journey, Mr. Root's father, Jerry, told the Associated Press in an interview.
"They were camping wild, as they called it," he said. "What helps me is to think of how happy they were with each other. They were leading the life they wanted to. It was the happiest, the most fruitful of lives."