How big is your pond and do you swim in it? Geese make an awful mess. Are you really sure you want them to nest? If you picnic, swim, etc, you want to run them off.
My parents had a pair looking to nest at their pond. They thought they looked really cool swimming on their pond. After a couple of days, they were trashing the place. They would try to chase them off, but they just swam to the middle of the pond and gave them the middle feather. So they called my brother and he brought out his 100 lb Chessie. They left in a hurry when they saw the big brown monster crashing into pond