Al, you need to buy or borrow marine
charts for your area, and check out the water depths. There's no other way to tell if you can still get to where YOU want to go, with the deeper draft.
You can read them online free at the
Maptech: Topo Maps Charts Navigation Software
GPS and FREE Online Mapserver online map server--in small pieces with lots of scrolling. Or find them free in any local repository library. But I'd suggest buying them, one way or another, if you plan to sail in the area.