I am playing with mine too much to put shrink wrap on it.  If I screw this one up I have another.  If I still have problems I'll just buy more.
If you have it shrink wrapped you may have a tendency to assume it is good and not keep an eye on it.  You may have a time when you need it and it will be corroded beyond use.  A protective plastic cover can also be a container for a corrosive agent.  
I think most Americans have a romantic notion about Australians.  Tell us what it is like there.  Is it mostly dirt roads and open country?  Do Australians tend to be self-reliant?  You guys need to clean out your government and get your gun rights back!  
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Thermo-regulate, hydrate and communicate.