Survivalist Max Djenohan sees your ultralight backpacking rig and chuckles. An eight-time contestant and fan favorite on the peak reality TV show “Naked and Afraid,” Max says roughing it with nothing more than a knife and a firestarter is both thrilling and gratifying in ways that belie the somewhat absurdist and lurid motivation for the show itself. In some ways, his run on the show revived his flagging relationship with the outdoors, following time as a professional snowboarder that ended in frustration. But, today, Max is back on snow while evolving the concept of survivalist TV in ways that are more engaging and fascinating than ever—and he doesn’t even have to get naked to do it.