The hydro's going into the Island are what people are scared of. Its right after you leave the park. If you do go, drop in stright. Dont try and pull off to one side or the other. Then whatever side the hydro's take you, go that way. Dont try and fight against it, You will be pulled into the Island. Thats how the boats have been sinking. Usually it takes you left, its a blind corner. But theres enough room to fit a boat in.
I would suggest you fish twin brigdes down tho, or even the town run. Low water fish low in the system!