You could do it, but I wouldn't.
Even if legal, you're really going to struggle going north up that big hill near the Wagga turn-off. As well as in a few other places. I wonder what the tow bar rating might be for your 240 - I know body a reinforcement plate kit is used on the 700/900s when towing over 1600 kg - and the hills will place a lot of stress on the tow bar. Not to mention the clutch, etc.
If things go wrong, insurance becomes null and void.
Given the load being hauled and the terrain, a more suitable tow vehicle is strongly advised. Perhaps a tonka truck rental from somewhere like Kennards.