We caught two this week... 10oz cannonball, silver protroll flash and hot tamale superbait packed with oil based tuna. I am running 24" to flash and 36" to superbait. Some are running shorter leader to superbait but 36" has worked for me. Keep your troll slow so your rod tip has a nice slow pulse. As funny as it might sound I searched a lot on youtube and watched other peoples videos to learn a little since I don't have any mentors myself. There was one video that was pretty good from a guide fishing fall chinook at DRANO. I have only just started fishing salmon this year on the Columbia also and noticed that if priest rapids damn flow is high it's almost not worth it. I spent most of the day clearing weeds off my line, however low flow days were awesome I could troll using electric motor and no weeds... I got mine going downriver in front of baitman island with all the other yahoos out there. Some guys will work below the 182 bridge near Howard Amon park on the Richland side of the river. I have personally not had any luck there yet. I think most people hang around baitman island because the river funnels down right there.