you know how they have those photographers that go to night club events and they take photos of you and your friends, and then give you their business card and you can go to the website and view the photos from the evening?
Do this, but in the park. Take photos of kids doing jumps and take camera footage too. Hand out your cards and also have some advertisements in the lodge, on banners/boxes, etc. Then when people go to your site they can view the photos/video with a watermark and for a small fee they can upload the real thing of themselves.
Actually, the real money would be in those that don't typically take video/pictures--- so your middle-agers with children. Kids in the park usually have cameras...either way, take this idea and run with it.