I had to do laundry on Main Street and I don't like to sit still for long so I put the baby in a wrap and took a walk down Harmony road. Us locals have always called this Turkey woods road for some reason. Park at the boat launch area and make a very short walk to GZ.
The cache is an empty medicine bottle with a little duct tape on it.
The map is showing this on the left but it is on the right side if you are heading from Harmony road to Susquehanna.