Some of the best crabbing I have ever done was in less than 4 feet of water along the south Florida coast wading the grass beds. Same here in Texas either dropping off piers with folders or even pots. Always had better luck in the shallow grass beds.
John, did you use drop nets or traps in Florida? I am from Galveston, lived in Kerrville for a long time and now here in Florida, but am having no luck at all crabbing here. We use to scoop them up without anything in Galveston, but not here, or not now?