UPDATE: New coords since area is now private county property. You'll be able to see this for sure when you pull back out onto the main road. I hope this new location lasts!
The cache is located in a pull off area off Route 28. You'll sometimes see police catching speeders, delivery trucks taking a rest or it being used as a laydown area.
The log isn't attached to anything so be careful when removing it. No need to go up the private road. Bring your own pen.