Just to confirm what I previously said, DPI&F do have staff on the water almost every single day. I just got of the phone to one of their staff (who works on the water) and he confirmed that they typically have someone on the water every weekeday and most weekends.
Now considering the pinkenba office operates from mooloolaba all the way to the gold coast thats a big ask. There is also a 3 person crew operating out of redland bay that assist with enforcement in the southern end of the bay