I guided on the Gulkana and Klutina River's in 98'. Where to fish can vary w/ the river conditions. If the water is high you have to get to tributaries via jet boat on the Gulkana. If low you can float it or hike to the mouth. Below the hwy bridge is no bait area. Puff balls here work excellent.
The Klutina is a heavy heavy gear river due to it fast flow, mediuam size red w/ black wing spinning drift bobber and eggs in spawn sacks with 5" pencil lead and 60# leader are good.