How do I find CG along route to another destination

I have used Microsoft Mappoint in years past and when I create a route from point "A" to point "B" I could also find campgrounds along the route so if I wanted to stop and stay a night before continuing on my way. I have not figured out how to do this using either Google maps or Mapquest. Does anybody out there know how to do this and can explain it to me please?
Thanks,
Mark