I have gone thru the chuck with loaded barges for years, the guy that flipped on youtube, was late on tide about 20mins, and going too fast for the 90 degree corner with too short a towline...etc etc.. watch the size of tides, slack water is usally about 10 mins on medium tide 5-8knots, on real big ones 10 in and 10knots out, there is no slack. the tide action is very dangerous for small boats on the flood. Do not attempt. You should be safe at hal hr after the tides, small 2-3 knot tides are ok even at max. if it is a 14knotter, be real carefull, don't be late or play games in there. you will feel the flood current all the way to earls creek logging camp dock on the right side going out..
slack water is not always book time..if the tide before is much larger than the next tide, it can turn early.
hopefully that can help you out. ( I heard a US boat tell his buddie, ahhh it can't be that bad, and he went in a max flood), lot of freaking out on the radio and yelling don't come in.....
I am sure after he changed his pants, he has more respect for it now.
tugs call on ch 16 securite, inbound at slack...