Whilst I agree that use of DVD's and iPads etc can make it less stressful at times, we have also found this to increase the tension in the car aswell. Arguements over who is watching what, he got 3 seconds more time than i did - this sort of Shit just ruined my days over the last few years with the kids.
We have found the use of colouring in books, journals for the older ones and the bit that was most entertaining was the kids coming up with the idea of their own dreamtime stories. When they were making these stories up - on the spot and spoken not written, they had my wife and i in stitches laughing.
So whilst i think use of the electronics can be of benefit, surely 6 - 10 hours of this stuff each day in the car is more detrimental than beneficial.
We certainly make multiple stops, usually just to get out and take a few photos and a look around. If coming into a town we will always stop at the park, preferably with playground equipment, if not a ball and bat or something similar.
As others have said, you know your kids and know when pushing that extra hour is going to make a good day a s h i t day, and no one wants to setup camp when everyone is already in a foul mood.
The other thing to consider is once past Ceduna, consider the coast road and the extra kms - the Eyre Peninsula has some spectacular coastine that is certainly worth the effort.
Best of luck with your decision and the trip.
Smartyingreen.
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