Go to some of the animal judging, especially small animal judging. Mid-day light is really harsh (lots of white painted objects) if it is sunny. Consider a monopod or beanbag for inside the barns. Stick around for the twilight time and go to the midway and rides. Try to shoot wide open when you can to minimize back ground clutter. aI started a series on county fairs (yet to be finished) so I've done a few. Personally, I preferred a fast 50 and 85 in 35mm, but the Rolleicord should be a lot of fun there too!