Being where the birds want to be is so much easier, but I understand not having that luxury. If the bean stubble is the only option, I would mud the heck out of my layout blind and toss some stubble on it. Make it blend. Then you get to experiment. Big spreads, little spreads (like 2-12 decoys) with blinds off to the side, power calling, little to no calling, flag, don't flag, put out snow goose wind socks instead of Canada decoys, pass shoot the downwind edge of the cornfields if no one is hunting them. You got nothing to loose by experimenting. If you get a big weather change and fresh snow, be out there in the fresh snow the first time the birds fly out after the snow. Hunt in the fog and just call every so often and listen to make sure nothing passes you by in the fog. I love calling geese out of the fog. Hunt high winds when the birds are flying down on the deck. Or buy a couple of stacks or bales of corn stalks and start spreading. Beat on every door in the area asking permission in the corm fields and look for other areas to hunt. Good luck
CRP was responsible for 25.7 million additional ducks produced in the U.S. Prairie Pothole Region during 1992-2003. Source DU.