I am not known as a river rat but if you use good judgement about what shots to take, you can have a hunt that is safe and productive as well. Somewhere I have a picture of a late season hunt last year on the Kansas River where three of us got limits of greenheads really early.
Just shoot 'em close, drop 'em upriver, and make DARN sure they are DEAD before you send the dog. Don't ever shoot more than you have the ability to easily recover, even if it means only shooting one duck at a time when you're hunting fast and deep water.
Best of luck to you! I'm sure you'll do fine.
I am just pullin' your leg.:D