Slice some time out of your busy schedule and come and hire a kayak. The Hays inlet is only 40 mins from the Brisbane CBD. This is a great spot for first timers as it is a calm and shallow location. The Hays inlet has great bird and fish life and there are plenty of great mangrove systems to explore.
The Noosa everglades really is the #1 for paddling in South East Queensland. You need all day for this one or why not camp overnight at one of the many camp spots along the upper Noosa river.