Another cache in Gluepot that requires a walk, but not as far as some of the other walking caches on the park. If you are keen you could also try riding your mountain bike.
You can approach this from the North or South along the Black Oak Swamp Walk. Either direction is a similar distance of around 1km along well marked walking trails. You can continue on to complete the circuit, or go back the way you came. The Southern approach may be less feasible after rain as it will be sticky mud.
Take a hat and water and wear long pants or gaiters in the summer, and don't forget your binoculars as you are bound to enjoy seeing the birdlife here.