Your little kid gets away from you in the dept store.  Just go the escalators and wait.  You go to one place and wait for a wanderer.  If you are the wanderer,  if you want to be found,  stay in one place and build a fire,  make it smokey if you can.  The pros will search on a grid pattern.  Stay in your spot,  which will be in a grid.  Patience.  You will be found.  They will do their job.  Yours is to stay warm, hydrated,  fed,  conserving energy and resources for a long haul.  Patience.