Once a direction is chosen, journeys tend to take on a momentum of their own. Nevertheless there’s a point, somewhere between when you’re confronted by a bright yellow ROAD CLOSED sign and the moment your tires finally slide across the surface of the rain-slick dirt track to churn in the mud, at which it becomes pertinent to question the omniscience of your GPS. This is a point a family of four and their long-suffering pooch fa...