Now in terms of trolling for trout
I troll out of my kayak. As such I do not want a lot of stuff between me and the fish. I use a 3-way swivel with about a 2' dropper for a 1-2oz sinker and 3-4' leader on the other eye for a lure. The lures I used last fall (really the first time pursuing trout by trolling) were a small panther martin on one rod and a small roostertail on the other. On each spinner I tie a couple of inch leader to a trailer hook. I then put about 1/2 nightcrawler hooked onto the treble and onto the trailer. This worked extremely well for us last year. A ton of the fish we caught were hooked only on the trailer. Now, when we were fishing in the fall the water was low and pretty clear. I kept my lures down about 15-25' deep. That was the depth where I marked most fish.
However, on some days when the weather was nice and calm in the afternoon and you could see trout rising I would drift around and toss a spinner (cast and retrieve). That was a lot of fun and got me way more fish than trolling once they started rising.
So, the take away is to experiment with depth and run some different lures on different rods. (The funny thing is that we would catch a couple on the roostertail then a couple on the panther martin. It did not seem like any one lure stayed hot all day.) Try different techniques. I think impatience and determination are the best qualities any angler can possess.