A few weeks back, I showed some images of the bows of several boats in a line. As I was finishing up the shoot, this gal swam up and hopped on one of the boats. She seemed to think there might be something good in there. My philosophy is that if you get in my shot, you get to be a part of my image.
The secret to making images of the swan boats is to pick a location with some nice elements in the background and then wait for the boats to pass by. They travel on a circular route every few minutes, so you never wait long. Cheers =)