Although the park is not named after Bon Scott of AC/DC (who wrote the lyrics to Let There Be Rock, released in 1977), it makes for a great excuse to grow your mullet and turn the volume up to 11 while remembering the driving beats of some classic Aussie rock from the 70s.
If looking to do a park and grab, DO NOT try to park on Canterbury Rd, it's just not possible. Rather, use the Griffith Pde pathway (indicated as trailhead) beginning on Farnham Ave where there is ample safe suburban parking.
October 2017 Update: I've moved the cache to a location a little further up the hill (better view), but do take care with the finding and replacing as there is a high chance of stuffing things up here. If you maneuver slowly you'll be rewarded.