...I'd probably go at night, when there weren't any people around. I've had to intervene at our park before, and even if you get the green light from the people in charge, there are always people who are going to confront you about it. I'd honestly just tell them the truth: these are domestic geese, they cannot survive in the wild or, for that matter, fly, and they have to go live on a farm where they'll be safe from predators.