Hmmm....I think you mean the spring holidays Nick - the winter one are in June...
But yes August is a good time after school holidays and before the next lot... and if you have a mid week booking it would probably be a lot quieter as there wont be as many people coming in and going out as there would be at the beginning and end of the week... However there are a lot of good deals over the net for Hotels in Brissie - we did a lot of searching for a good one when we came down last and there are lots of 3, 3 1/2, 4 and 4 1/2 star places available for a good price and being honeymooners i think you would prbably get a slight discount...but don't hold me to that...