The Stray New Zealand concept is simple: You travel by bus hop-on/hop-off style along with about 30 other young travelers and backpackers. The average age is about 24-25. The pass you choose determines the route. Along the way, the Stray bus driver tells you all sorts of things and fact about New Zealand - in fact he is more a guide than a driver. If you haven't been able to fix yourself up with a place to stay for the night, your Stray driver/guide is the guy to go to. They are there for you when you need them. All very flexible.