>"we'd end up keeping him warm and fed somehow instead of just enjoying the evening. "
The father of a friend was doing JMT in winter(!), west of Mammoth 30-odd years ago, when, one afternoon, they come upon a downhill skier. The skier had gone west instead of east at the top of the mountain in a whiteout and by an amazing struck of luck intersected these well-equipped, back-country skiers. The skier didn't know he was in the San Joaquin River drainage and was still thinking if he kept heading downhill he'd hit the ski-area parking lot or at least Highway 395. They made camp early that night, fed the guy dinner, had him sleep between their sleeping bags, fed him breakfast the next morning, and STRONGLY encouraged him to abandon his skis, and start following the fall line back to the ridge so that he might make it to the top of the lift while it was still going.