That's not necessarily true. It all depends on how pressured your area is. Last year on early season opener I was the last field in the flight line from the roost with 7 other decoy spreads between my field and the roost. It was a cut wheat field with windrows. First day I hid with a kid outside the decoys and cross shot and easily limited. The birds were super nervous and flying high because they had all been shot at numerous times already. Drove up to the roost after we were done and every other field was still hunting. Next day a buddy came out and wanted to hide in the decoys. We shot geese but they were sliding off. Had to move outside the decoys, even though we were in wind rows, and the geese finished. You don't get a better hide then that. Two weeks later I hunted the same area with a buddy who's been a goose guide for 6 years. We decided to hide the layouts in a small wetland in the field. I was hesitant that we weren't hidden well enough, my buddy thought I was high. Guess what? Birds saw something they didn't like with the blinds and they would slide. I know some guys who hunt in eastern Wisconsin and they still limit out on early geese in silage cut corn fields with layout blinds. I see the photo's of their blinds and how they're hidden and laugh. It would never work where I hunt. It's all about pressure, and how new the birds are in the area. That includes any season.