The teens claimed CBP targeted them because they hadn’t booked hotels for their entire stay in Hawaii.
“They found it suspicious that we hadn’t fully booked our accommodations for the entire five weeks in Hawaii,” Pohl said. “We wanted to travel spontaneously. Just like we had done in Thailand and New Zealand.”
I met a good chunk of Europeans and Aussies while thru hiking on the AT a few years ago.
All of those folks did not have full accommodations booked in advance, that would have been impossible. They seemed to find that pretty normal and were not turned away.