The movie 'Leave No Trace' is indeed a true story. It was inspired by real-life circumstances and characters, presenting a genuine and touching narrative.
Well, it's difficult to know. They might be scattered all over, leading normal lives without much publicity. Or perhaps a few are still associated with similar causes or projects related to the original story.
In 'Leave No Trace', the father's back story involves a deep disillusionment with mainstream society and a desire for a more isolated and self-sufficient existence.