Swattie is a hidden gem BELOW the dam down by the Giant Center. Float there to the mouth, work the runs and eddys, and Walleye, some hog Smallmouth, and Musky all await.
While opportunities exist for a decent Smallmouth or two and holdover Trout from the drainage basin above, pickin's are slim. Know that the Cat guys know where they lurk as well (numerous holes with 12-20 feet of water hold Cats in the upper stretches--but most of the water is 4 ft or less in depth in the upper Swattie). Fall fish (aka, the PA Creek Chub) are the most abundant species in the upper Swattie in my experience, although in fairness, I've never seriously fished while floating it . . . just had the pole along for the ride while floating it w kids/friends.