I think it was science fiction writer Charlie Stross who said that anyone wishing to settle Mars should first try settling the Gobi Desert in the winter while wearing a fireman’s respirator.
Somehow I doubt these folks would want to do that, but at least they have more imagination than the wretched politicians who have grounded the idea for so long. Meanwhile, we can hope the intrepid don’t go entirely alone either.
THE TEXAS SCRIBBLER 
I would say send only mature married couples. Women’s survivability is high anyway, and a married man would have already passed through some tough testing 😉
Good point. But nobody high-strung.