Note: The above co-ordinates are not for the cache, but for the first stage.
Head down to the posted co-ordinates and use the pass phrase "c0g t00 hack". Thats it.
At the final you may want to approach from the road to the south east, especially if it is at all wet. Adjust the final coordinates by N -0.086 W -0.154 minutes to find a suitable parking spot.
I hope you enjoy the cache, but please enjoy it in moderation.