Kaitoke ridge day trip + swim

Fairly easy wander along the Kaitoke Ridge between the the Te Marua entrance and Waterworks Road campground of Kaitoke Park (where Bush Rave was). 
Unfortunately it's not a loop track so there's a few options depending on numbers:

1: we have 2+ car loads and can have a group going either way with a key swap in the middle

2: just go directly back the way we came

3. drivers drops everyone off at start, drives to other end and I get a mate to drive them back to start end (best option tbh)

time/weather dependant we can have a wee swim in the river as well 

costs will just be koha for drivers