Also remember creek hunting is a little different than field hunting, in the times that the geese will want to be there. If it's cold, the birds may be on the creek first thing, then fly out to feed, then back to the creek, so may be a little later that your seeing geese that actually want in to your decoys. Other scenario is they fly off the main roost to go to the field, then use the creek as a "mid roost". When I first started hunting geese, it was just a pond, so we would see lot of birds fly over in the morning and want nothing to do with us. Then typically about 9:30-10:00, all heck would break loose. Knowing what I know now, that pond was a mid-roost, just a place for the birds to hang out and get some fresh water, until heading back to the field for the evening feed, then back to their main roost for the night.
Good luck, I still love hunting geese over water, just something about it.