Susquehanna River Fishing for Bass and Flathead Catfish. Looking for a guided fishing trip in PA? We are the Susquehanna Rivers #1 Rated Flathead Catfish and Smallmouth Bass Guide Service. We are conveniently located near Harrisburg,Hershey,York,Lancaster and Gettysburg. Just a short drive from Baltimore and Philadelphia as well. The Mid Atlantics best Smallmouth Bass and Flathead Catfish fishing. Susquehanna River Corporate trips and sightseeing trips.