Firstly, I have done the drive 4 times. (don't ask why, as once really is enough)
One section of your proposed route with three fly in Victorian kiters, only two made it back (one fell in love and fell in love with WA)
I'm biast as I live over here in WA so I'd skip the majority of the EAST coast so I'll leave that bit for the East Coasters to reply. BUT don't dilly daddle around over there on the EAST as you will be kicking yourself once you get WEST and run out of time. I liken the East coast to shopping in a city, you seem to not get a great deal done but time certainly flogs along way too fast. Something to do with all those people and traffic slowing things down, yet speeding up the clock.
I'll pick up the chase in SA by coming across via ROBE, have a kite there, don't stick around too long as there's plenty of great spots. Nice Crays, but better in the West. Focus on Mum and Dad, the reaally good kiting will come later.
Skip Adelaide.....no wait, call in there and get your cooling system checked out well and truly. I'm sure one of the boys can recommend a mechanic for this. Also ensure your camper has good cooling (fridge/freezer) get a good esky otherwise and be prepared to buy lots of ice.
Skip the Barossa....
Go the CLARE VALLEY, grab some decent wines and wander around, that should take you about....1/2 a day. It's North from Adelaide and off the coast. Again, do this for Mum. Lovely Reisling wines.
Then take a look at your map. Head for Wallaroo, good kiting there. King George Whiting is the go there and Scallops.
All of Eyre Peninsula is worth exploring and often missed by many a tourist coming across.
One spot to mention: Stop in COWELL and fill your belly full of cheap, sweet oysters, buy your mum some Jade.
About now you can really slow down, as there's plenty of space and you can make up time when needed. Kite lots in this area.
Explore, camp a bit and enjoy that good wine you picked up in Clare as you watch the sun set almost over the ocean but kinda out of your right eye a bit.
Kite your butt off
Then boogey across the nullabor, don't stuff around, get it done...... one nights camping on the bight will do it, plan your trip so you can do that. Drink the wine and left over seafood is a must on this evening. (now you can see the importance of a good cooling system)
Esperence is truly the start of the magic...spend some time there, a week from the start of the National Park. Too much beauty there to be wasted. There you can check out kangaroos lying around in the early morning sun on a crystal white sand beach where the water goes from clear to black with allthe turqoise and jade colours in between.
Skip the Southwest, your Norwegian, I'm sure you know what trees look like. Albany has some spectacular coast and good kiting if the conditions suit, get some more wine here. Again your a cold water person so it shouldn't bother you kiting there.
There's some average spots for kiting from there up, but nothing that is better than on the Eyre Peninsula of SA of Esperence. So get NORTH.
Perth is hmmm....a city, need I say more?. Your'e in Australia, I'm sure you want to see the outback and the beaches.
Consider th folks by now and maybe leave them lingering in Perth for your kiting mission to come:
Put up some ads in the backpackers of your intended trip if your'e a lonely boy and I'm sure you will find a travel companion

Do the following:
Lancelin
Green Head
Jurien
Cervantes
Dongera
Geraldton
Pt Gregory
Shark Bay
Exmouth.
Sorry, but by my calculations your out of time.
Go home, show your slide show and do your bit for the Aussie tourism industry.
Been a pleasure having you.
PS - Don't watch wolf creek, it sucks.
If you need any specifics on places mentioned, e-mail me.