I dont know much about flats. But Im ready to catch 'em. The river I enjoy fishin is a small one (The St. Marys, in Ohio) Most of the holes are shallow. Some holes are 3-6' or deeper. But for the most part you can walk the river. The river is sandy for the most part. There is a vriety of fish, Ive caught Channels (7-8#) saugeyes, bluegill, crappie, drum, carp. And I've heard of pike being caught. But what I am wondering is if I'd be wasting time goin' after Flats in this river. I hear lots about catchin' flats in the big rivers. Is this river big enough? May sound like a stupid question, but Im a bit ignorant on the subject.