There are two 'groups' of caches in the series that can be done from the Parking Waypoint:
1. GC4F7Z0, GC4F831, GC4F7YE, GC4E3XA
NB: After doing GC4E3XA, return via GC4F7YE to the Parking Waypoint
2. GC4FMRD, GC4FMQN, GC4FMRC, GC4F7ZF, GC4EA0N
NB: It is best to do this group in the listed order and retrace your steps back to the Parking Waypoint ... you are NOT advised to take a direct route between GC4E3XA and the Parking Waypoint (CO has done this, but not in tick season).
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.
Mickeydv
Mickeydv on Serpentine Gnomes 1 to 6: "found with KB on South West caching run....cheers firnsy"
It seems that you were unfazed by the terrain Mickey! And from KB's log on Gnomes 6, it seems that you had a "lovely experience". 
The Cache
The creature that resides here would also be unfazed by the terrain ... it should be easy to spot if approached from the correct angle.
Attempting to traverse directly between this cache and Gnome Hunters: Chwiliwr is NOT recommended ... especially not in tick season! But it is a bit of an adventure ... and I'd say "go for it" if you like traversing terrain that takes 25 minutes to travel 70 metres!
The 'easy' way into and out of this place is via Gnome Hunters: Grumpy Bump, OOH YEH and some others ... there is also a 'quick' way in from the south.
The cache is a bison tube.