It depends on whether he runs out of clothes. If they decide to go out at night in the woods, they may do laundry afterward.
He said their backpacking trip was hot and humid. They were going to go for three days, about six miles a day, but they were so uncomfortable that they did 15 miles the second day and then returned to their various parental abodes to do laundry and play computer games.
Humidity...the scourge of hikers everywhere!
Is he back in college, this fall?