A BIT TOOOOOOOO MUCH IN DAYS
I do Brisbane to Townsville often by road and have done Cairns twice this year in heavy vehicles, the road north of Ingham is in a bad way, with much rebuilding and repairs after the all the bad weather they have had over the past couple of years, road speed is down to about 80 ks nth of Ingham with a lot of stop start road works delays. I dont know what distance you are capable of doing each day, I quite often do Brisane - Townsville 1400 ks in a long day about 16- 18 hours depending on what I am driving ( log book hours slow me down) there is much to see if you take your time
Bundaberg it is a town that has a lot to offer the traveller / tourist,
at Rockhampton you have Yeppon, Mt Morgan & The caves +++ .Then Sarina & Mackay has lots of interesting places to explore and Airle Beach . Townsville over the last 10 years has lots to offer the tourist Cairns which is another 380 Ks I consider this the most scenic part of the whole 1800 ks I never get sick of the scenic beauty that one drives through fro Bne to Cairns.
From my experinces with 17 days and a young one I would take the scoobie doo on this holiday and do an about turn at Cairns .
Happy touring what ever you decide
Hodgo