Lost your probably right but doing it this way gives us more time on holidays and saves the long drive back.
Ok here are my findings.
Darwin to Melbourne can be done around $1500 but the only issue with this is that it may take up to 6 weeks to get it there on a back load. And this doesn't suit us because we would need to collect it in Melbourne and accompany it on the Spirit of Tas. Sending it unaccompanied is too expensive.
Darwin to Tassie can be done for around $3900, this would also take up to 6-8 weeks which is fine because we would fly home and just collect the car and camper when ever it arrives. However at that price, once you factor in airfares to get home it is an expensive way to get an extra weeks holiday and save the long drive back. So we are not going to go with that option.
The other option is the rail that cyberess posted. They are only $1100 from Darwin to Adelaide. A little dearer than road transport but they leave on the Wednesday and arrive on the Friday, so no worries about waiting for things to arrive. They can not take the 4wd from Adelaide to Melbourne due to height restrictions.
So the big question is, do we spend the extra (approx $500 is the net spend) to fly to Adelaide from Darwin to save a few days driving and gain that extra in holidays?
oh and before I forget, Autologistics are laughable with getting a quote. They are a broker and only allow you to get quotes on their online system. It took 9 different quotes and 5 phone calls to them to get 12 different prices!!
On the other hand, the rail people and openica logistics where very switched on and knew exactly what was what.