The young royals, who lovingly call themselves Mr. and Mrs. Wales, chose a modest cottage in Wales over Buckingham Palace, and resisted taking on butlers and servants.
William returned to work as a search-and-rescue pilot in Anglesey, while Kate was seen grocery shopping for the couple herself.
The commitment by Prince William and his bride to live a modest, royal life is another trace of his upbringing, and his late mother's efforts to shield her sons as much as possible from the inevitable media glare.
"They protected him," Arbiter told "GMA," of efforts by Charles and Diana to set up photo sessions for the princes to avoid photographers in their daily lives. "He was in the media constantly, but they tried to protect him."
No protection can guard the young couple, however, from the media glare that is bound to descend on them again as they prepare to travel to Canada and the United States next month on their first official overseas trip as a married couple.
William and Kate will embark June 30 on a nine-day, eight-city tour that will take them from Ottawa and Montreal through the Northwest Territories of Canada before making their way down to Los Angeles, Calif., for a grand finale full of both philanthropic work and red-carpet affairs.
But the philanthropic work and their very modest travel arrangements, by royal standards, are what royal experts predict William and Kate will seek to highlight.
"The palace says they're not taking a huge entourage," Larcombe told "GMA." "They're trying to start on the right footing."
"This is the first overseas trip for them and they don't want to be seen as too extravagant," he said.
And when William and Kate return from their trip, it will be back to everyday life for the Duke and Duchess.
Prince William will return to his Royal Air Force duties and Middleton will oversee the couple's move to Kensington Palace.
It will be a new start and a new home for the royals, a home Middleton is reportedly already busy decorating with new cushions and her favorite scented candles.
The Associated Press contributed to this report.