Your experience with this cache will vary. If you visit on a lovely clear calm day, you will possibly walk away thinking this was one of the better moments of your caching career. On the other hand, if your visit is on a day that's not ideal, you'll be wanting to hunt us down and hang us from the nearest tree! Luckily there aren't many in the area :o)
The Drive
It may seem strange dedicating a cache to a rally driver, but I'm sure once you've visited this cache, you'll agree that Possum would have enjoyed himself if he was visiting this area. The drive to this cache is nothing short of, how can I put it. . . interesting.
Bad weather will restrict the accessibility, at least by car. If it's wet you'll need a 4WD, if it's snowing I think you'll have to walk, or use a GeoCopter(tm). Given this isn't really an option for most cachers, I'd try to pick a nice clear dry day for the best caching experience. Tourists should be encouraged to have a go at this one, especially if you have a hire car ;-) Cachers using GeoCopters(tm) should be wary of transmission towers in the area.
The Cache
You're looking for a round plastic container. I haven't used this type of container before, so I'm not sure if it can handle the environmental extremes - maybe the first finder can give me a report on how it's doing? The contents are all in individual zip lock bags to protect them from the weather - if you swap an item please place it in the bag that held the item you took.
The terrain around the cache is somewhat rough, so to make it a little easier to find I haven't hidden it out of view, as long as you walk past it, you should see it. The chances of GeoMuggles finding it are slim, I really don't think anyone will be casually walking past.
Warnings
As with much of Tasmania, the weather in this area can change in an instant, please keep this in mind whilst visiting the cache. Take adequate clothing, wear good footwear, and please drive carefully.