Thanks Barney for the suggestion, but correct me if I'm wrong. I have an impression that camping in the commercially established campsite feels like camping in someone's backyard, it might even has all the facilities for convenience, but the feeling of camping can't be compared to those by DERM or bush camping. Although one of the deciding feature of Girraween was the hot shower it has.
Looking at the weather over in Girraween, it looks like it's going to rain for the whole weekend, so, I told the missus Girraween might not be an ideal place to be this time. And from the DERM website, there are other place such as:
D'Aguilar,
Crows Nest,
Mount Barney,
Amamoor State Forest and
Conondale National Park
around Brisbane, which have a fireplace beside the campsites, showers (cold....when I pointed that out, her face went

).
oh, well, I guess I can only hope for the weather god's mercy as she's really keen on the hot shower and the big rock over in Girraween.