Originally posted by twhitehead
What makes you think they want to return to civilisation?
Well it was kind of implied in the question in the OP as "staying strong despite having little to no
chance of rescue" is not a problem if you want to be all alone and not be rescued.
Also, your odds of survival are [in general, and almost all circumstances] much greater as part of
a civilisation as opposed to being all on your own. And almost all people want some form of social
contact and support [us being a social species] with those that don't being vary rare.
So while it's possible that [either together or alone] the people in the op 'might' not want to be rescued
and get back to civilisation, it's not very probable and it's contraindicated by the OP.