Your questions will get far more constructive answers if you post them here:
Backcountry Pilot You will also find a few Aussies on board.
Here in Australia this sort of thing is dangerous, not to be undertaken and may result in prosecution. You won't have the skills either and the naysayers will only mention those that have made mistakes.
Use only the edges, fit big tyres, learn how to test the surface, and use a STOL aeroplane with a tail wheel. Have fun!