we just spent 3 nights over the weekend camped at Jondaryan Woolshed (just past Oakey), we were in the unpowered area down on the banks of Oakey Creek. great spot with fires allowed and amenities block about 150 - 200 mtrs away back up at the powered area that had plenty of showers and toilets there.
the guided tour they have there is well worth doing, plenty of history to learn of the property and then wander about the place checking everything out at your own pace, even had a animal nursery there for the kids also.