I Have recently gotten back from a fishing trip in central Pennsylvania. With rising water temperatures the end of spring creek season is closer than you may think. Rivers like the yellow Breaches and and Penns Creek have been fishing very well recently with small caddis and mayfly imatations. The set up that I found to work the best was a size 16 caddis and a mayfly nymph 20 inches off the back. This allows you to target two very different sections of the water column and catch more fish. Making delicate casts is essential because these fish are rather spooky and will not eat if the flies are not presented properly. The fishing up in PA is really something special to experience and I recommend stopping in the shop to stock up on flies before you head out there.