Rock stars can be demanding guests. Rock legends, having grown accustomed to decades of wealth and fame, even more so. Add a relentlessly active brood of adult children and their film-star partners, and suddenly a guided glacier hike and hot-stone massage just won’t cut it.

Over several seasonally elongated days at Deplar Farm in Iceland—one of the luxury adventure-travel firm Eleven’s 12 lodges around the world—one stadium-filling rock legend and his family fished for trout in a glacial river, rode horses on the beach, watched humpback whales blast out of the ocean, enjoyed a cold plunge and a Viking sauna, floated beneath the aurora borealis in a heated pool, and rode fat bikes to Flóki, the oceanside studio where Justin Bieber recorded his most recent album. Then, because it was already one a.m. and the sky was brightening, one of the kids went surfing. And they did it all largely without the intrusion of other guests. “This, to me, was the closest thing to being on a private yacht,” the rock legend’s wife told me. “I would definitely go back.”