The fishing at Paco is great! If you are fishing Paco in the after noon fish will be munchin on Pink Cahills. At these flows finding fishable water is easy. Your casts are very short. Flys you need are Tung. 20 inchers in size 10. San Juan Worms red or brown. Bubble Back emergers in size18. As well as Anderson Bird of Prey in Tan size 12. For the Green Drakes I would fish a size 10 Foam Drake. The flys for the Pink Cahills are Foam Para Pink Cahill in size 16 and A. K.s Melon Quil in size 18.
Good luck!