"I think since Christmas, Ann and I have only slept in our home one time," Romney said. "The other nights have been on the road."

He said he and his wife try to "get together a couple days a week," but usually they are going in different directions.

"It's more demanding than I think people would expect," he said on of the campaign trail. The former Massachusetts governor joked that he is racking up the "frequent flyer miles" traveling the country.

Romney, who has five married sons and 16 grandchildren, credited his family for supporting his campaign.

"They've all got jobs," he said of his sons. "They give me a weekend here, a weekend there." 

He said that on the road, "when we're in the neighborhood where the kids live, we're able to get together with them and see the grandkids."

Ann Romney has become a steady presence campaigning for her husband in various states, as well, and her family has said it's her goal to "humanize" the man who has sometimes struggled to achieve a connection with the working class.

She weighed in on the topic of life on the road with her husband a few weeks ago on her Pinterest page. "Mitt and I just missed each other on the road in Michigan — here's the note he left," she wrote in the caption to a picture of herself holding up a note from her husband. The note includes a heart with an arrow in it that reads "I love Ann" and a note: "Miss you and see you soon! Love you." 

On his wife's Pinterest page, Romney noted that his wife's recipe for "meatloaf cakes" is rightfully popular on the virtual scrapbooking site.

"That's my favorite, the meatloaf cakes are the best," he said. On Pinterest, the commenters are calling the recipe "Mittloaf."