I don't know about more fun that playing, but I know of a private course with a pond that catches lots of discs. And I know of a few guys with homemade pond rakes that have gone there specifically to drag for discs. Underlying this is a hope they'll find their own, but they've dredged up plenty of others in the process.
The pond is swimmable and, even when not chasing down one of my own discs, I've gone swimming for pleasure and spent 15 minutes or so dragging the bottom with my feet, in the splash zones, hoping to find what whatever I could. Though the appearance of snapping turtles late last year somewhat curtailed my enthusiasm for feeling along the bottom with my edible toes for something hard, flat, and round.