Here are some pertinent GPS #'s for guys that have software
Marker in river near the ramp N28 10.937 W82 48.379
Northend of Anclote N28 12.504 W82 50.824
Outer Marker Gulf Harbors N Channel N28 14.602 W82 47.197 Flashing Red 5S --- too hotel
For guys running in, here is an online chart viewer for all NOAA charts quite nice.
http://ocsdata.ncd.noaa.gov/OnLineViewer/