Nah, just find a farmer. He will love ya for the kero and grog. Most farmers and a shitload of small town Australians have SKSs and L1A1s buried either on their property or in the bush somewhere. If you are really worried you should be you should try getting cozy with some older blokes now. Obviously avoid any criminal sorts for the blackmarket, avoid bikies, lebs etc.
A pot still would also be useful for distilling shitty grog made from white sugar, the resulting vodka can then be used for sterilizing shit, getting a fire going and can also be used for vodka shots or flavoured to make other spirits . Snobs will tell you it isn't the same as distilling from proper wash (as in making rum from rum wash etc.) but in such a situation no one would care, as the approximation would be close enough. If you snag some molasses for horses/cattle you could make rum proper. Shit stores long term so you could consider it a cheap investment. You could even use it to get friendly with the type mentioned above. The sort to go along with that are generally going to be rather mistrusting of the government and bitch about how all the taxes on grog means it costs a fucking bomb to get pissed etc.
Make sure you pay an arm and a leg to get the still registered of course, be sure to pay excise tax and keep it legal!
Also, coles apple juice (like the homebrand shit that goes for around a dollar a litre) can be made into rather decent grog. Set yourself up with a few of those big blue water containers from bunnings and you can make decent apfelwein for two fifths of bugger all.