Black river hunting

I'm thinking about hitting the black river, and shooting some ducks tonight or tomorrow night. Scouted the area a week before the opener we launched from dunton and went all the way back past th train tracks. Has anybody hunted on the river lately? Was wondering if it has got so shot up that the birds are pretty educated now. I was also wondering where exactly you can and can't hunt. My dad was alway saying back in the day when he hunted there you had to go past the train tracks to be able to shoot. Does this rule still apply? Thanks for any info!

Black river hunting