Free: Contests & Raffles.
Scouting is you best bet....Your talking some dangerous hunting. Maybe try walking out there in daylight without a gun and decoys would be in your best interest. There are many bad holes, Ditches covered with grass and so on. There is a reason you don't see a lot of people doing it.Besides getting hurt. With incoming tides you may loose you avenue of escape.No bird is worth your life. I have seen some come back without decoys, Some come back without gun. Some luckier then He!!to make it back at all...but wet and hypothermic that had to leave the waders behind.Since you don't know tides, conditions.... Let someone know where you will be at. And when you will be home. Easier for 911 to find you.