Who's quote "if we'd had any idea where to look".

I think that was Chris's father's quote.

what did chris mccandless look like

The above quote is Walt's....

Walt does not deny this. “There’s no question in my mind,” he says. “If we’d had any idea where to look—OK—I would have gone there in a flash, gotten a lock on his whereabouts, and brought our boy home.”