In the many years we have been going to Fraser we have never had any problems with the dingo's, when we camp north of Eli we have on many occasions had regular visits from a dingo, would come and stick his nose in to say hi, and then walk on up the track, when we were in our tent (pre camper days) he would stick his nose right in the tent, never had a problem, as we always locked our food in the car etc.
We have on most trips had more of a problem with backpackers partying all night and having no consideration for anyone else, and people using our toilet without asking us (backpackers were the worst)
I say leave the poor animals alone, watch your kids, and enjoy one of natures wonderlands