Run at least 50ft of Fluoro to your mono, lead or fly line while trolling.
That’s a lot of leader... I have no problem with just 12-18’ using lead core or fly line. The lead core and fly line follow the path the boat takes, the leader line doesn’t, so any turns or zig zags you make would be a lot less effective on putting a different action to your presentation.To the OP, do you have any sort of sonar/gps map? Are you using a Rapala that is said to dive 5ft or using some sort of sinking line? Speed control important when it comes to trolling and your lure choice. Are you paddling or do you have a peddle drive system? That can impart different actions to different lures. The rapala stick baits should work fine, just stick with the smallish ones and test the action next to you as you paddle to see what speed you should be going. Other thing is, when the water is colder, before it hits 55F, they may not be as aggressive and want a slower presentation, which live bait or plastic (gulp minnow is my go to) might work better, or even inline spinners like a Mepps with wider blades that work at slower speeds.
I know that is what I used to do. I have been keeping a log and that is one thing that increased hook up rate. Hook up rate goes way up in clear water. I use 100 ft when fishing Ontario. Give it a shot run one rod next to the others and see what happens. I have had zero problems.
I guess I’ll try it with 50 or more feet of leader then... but I use a fly reel so that’s a lot of extra reeling lol.
I typically troll for salmon between 1.8 and 2.2 mph with spoons. If using live bait slower is better. 0.5-1.2 mph