Here is how Marvin’s Guide Service trolls for Spring Salmon on the Columbia River.
I use 30# test tuf line on my reel. On my line I put on a barrel swivel then 2 or 3 beads, this swivel will be for your sinker it will be a sliding sinker. Then tie a bead chain to the line, tie a piece of line to the bead chain about a 2 foot piece of line than snap a flasher to that bead chain, now I like my hooks to be 3 or 4 feet from the flasher.
You can troll with a spinner or hearing, Whatever you like. I just troll down river and make sure you are hitting the bottom, you want to bounce on and off the bottom.
Remember you can only keep hatchery salmon.
see my salmon page