Hudson, Florida - hazardous channel??

[ThanksLori]

Seeking info please: I'm going to bring a boat (draft 4'7") into Hudson and into the Sea Ranch canals to berth. I've been alerted that there are unmarked hazards in the marked long east-west channel (R2 to, say, R20 near Sam's restaurant) and also some shallow spots in the "nearshore" channel that runs from Sam's to skirt the big condo development and then south along the seawalls condo peninsula and the Beverly Drive seawall. If anyone knows of these hazards and cares to share either "rough location" or GPS coordinates, I will be very grateful. I know I'll have to make the run in during high water and am also seeking info from local sailors.
Fair Winds