Duck hunting open water tomorrow - advice?

This morning's unfruitful hunt revealed heavy bird activity out away from the banks in open water. Mainly various divers but a few greenies mixed in.

My plan: Be in my sneak boat tomorrow anchored in the middle. I bought a greenish tarp that I hit with gray and brown paint that I will put over the boat (cut a hole for the seat). Planning to have a string of decoys trailing away from the boat.

Solid plan? Tomorrow is the last day so I figured why not try it.