The Neverfail Trail and the Coba Point Trail lead to a lovely bushy place with views over Berowra Creek. The trails are very level. You can reach this cache with a decent bushwalk (around 19km return), on a mountain bike or, I imagine, you could come up from Berowra Creek if you have a boat or kayak and can find somewhere to park it.
Use the additional waypoints to ensure you don't cross private land.
ABSOLUTELY NO TRAIL BIKES ARE PERMITTED ON THIS TRAIL OR ON THE LAND AT GZ!
If you are walking out here you should take the time to check out Denny trig (see waypoint) and Yurt's lovely Hawkesbury Lookdown Book Exchange.
When you get to GZ have a break and enjoy the views. Coba Point is a small riverside community much like many others on Berowra Creek and the Hawkesbury River. Coba Point's most famous resident is scientist, environmentalist and 2007 Australian of the Year, Dr Tim Flannery.