You seem to want to “beat” the scheduled opening times of the bridges. But... you CAN’T, or at least not by very much.
The opening times are well timed to about a 6.5 knot
SOG. If you maintain that speed, you will touch each bridge as it is ready to open for you. This area of the ICW
is pretty much all no wake either for manatee protection or because of marinas
lining the shore, so 6.5 is about what you are going to do—bridge opening or not.
If you came up to a bridge, and the tide board said 20 feet and you had another source that said 24 feet, and your air draft
is 22 would you go run through? I hope not...
So now we have established that you actually DO trust the tide boards... USE THEM.