The missing hiker has been gone for two days and two nights. The temperatures
get cold in the Uinta Mountains, even in the summer. If he was expecting to
return home on Monday then it is unlikely that he had a tent and sleeping bag.
If he isn't found on Wednesday (today) then his survival prospects are not
good. When I was about twenty years old I spent considerable time in the Uintas
and I always had a tent,sleeping bag, and food with me.