Hi mate
Like Rick said be carefull on run out tides. You get pressure waves popping up out of no where and a hard to read.
I've launched back creeks a few times and has it's challenges depending if it's been dredged, tide times etc., you may have to punch through some waves.
If you do go up and have a chance, walk out to the end of the wall atbthe river(bar) and watch how the tide and waves react and where the boats go out, mostly you go out on the south wall, better then trying to figure it out in the morning.