Sneakin' is loads of fun. If it's allowed in your state and there is something to conceal you as you sneak (a ditch, rice levee, tall grass, something) try that. Get as close as you can (40-30 yards) and stand up and blast away.
Other than that, the other suggestions are great; forget the dekes. Snows are just too decoy shy unless the conditions are absolutely perfect. Find where they want to be and get there first.
Good luck.
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