I grew up camping in the Whites with my family, that's all we did. By the time I was 15 years old, my mother would drive me to trailheads, and I would point out other trailheads and say, pick me up here in 3 days. She would always be waiting for me with a lunch. She knew nothing about hiking exept that's what I wanted to do. So, the scenario so many question, seems perfectly plausible to me.