The Gundy Common is a popular area among locals.
You will need a 4x4 to get out here. There are usually cows in the area so be mindful of them. Please also be wary of snakes! one time I was here I saw 2 within minutes. This is also where my best friend taught me how to drive manual in her little red vitara. Some great memories are made here by many people.
The cache in question is near an old wrecked car. Pretend that you are interested in the car (what's left of it) and you shouldn't look too suspicious. I suggest going mid morning during the week. The Common is a large area and not usually busy so you won't need much stealth if you don't see anyone.
Cache is a yellow metallic micro. Happy Hunting!