There are two groups of caches in the series that can be accessed from the Parking Waypoint:
1. GC4FX18, GC4FX4Z, GC4FX6N
NB: It is best to return to the track after each cache.
2. GC4FX6A, GC4FMVT
NB: There is a bit of a hike for these 2 ... and potentially a creek crossing.
It is best to return almost to the Parking Waypoint after doing the first group rather than attempting to go directly between GC4FX6N and GC4FMVT.
There are also some other accessible caches in this area.
The Gnome Hunters
This series pays tribute to cachers who have completed the Serpentine Gnomes series and celebrates some of the great logs written by said Gnome Hunters.
Tomthewizz
Tomthewizz on The Guardian Gnome: "We did this one the hard way as geomum had had enough of blinking gnomes so we plotted a course for the carpark and did more bush bashing and deposited mum in the car to have a cry. And then onto the final guardian gnome.".
Nice one Tom.
The Cache
There's a bit of off-track terrain to negotiate for this one. Tom's mum might be advised to wait in the car, but I bet she doesn't! 
It's an ammo box and there's a cairn in case your GPSr doesn't play the game.