@roger,
I asked, he has a cell, but of course he'd have to be in cell territory, which I assume is far from Chaco.
There is a ranger station, given he stays on the main dirt road, er, trail.
I've no idea about search alerts (city girl) and of course, he might have left hours ago. I think both D and D are sleeping.
With luck, he's stopped somewhere for a snack and is lolling about (he has gas and water).