We have a 8 ft draft and 76 ft mast
and have visited Biscayne Bay 4 times...
Come in via Biscayne Channel on a rising tide you may bump at low tide.
You can anchor
in No Name Harbor but we prefer to be outside on the other side of the channel in 12-15 ft.
We anchor just outside the Dinner Key mooring
field to the north of the Brennan Channel but we ground at low tide. Holding is poor anywhere in the Bay except No Name.
At low tide you will probably run aground in Dinner Key Marina.
We also anchor outside Marathon on the north side.