Gord, Thanks for the links. Checking those, and actually speaking with the St. Lucie Lock operator (772.287.2665), here's a recap:
The OWW is open. Recent rains have brought the water
level up some, but it's still pretty skinny. Route
is 2.94 ft. Route
is about 8 inches.
The two locks are only open once each day.
Too skinny for a 4 ft. draft boat