I have hit bottom in 100 with standard size dipsy. I think 350 ft of wire set at 1 1/2 might do it. Smaller the lure and slower speed, deeper they go. Spoons would have less effect on the diver than a large attractor. Good luck
I was out fishing out of little salmon river and noticed temp came up the deeper I went. I had most of my gear down 100/120 and hit 49 degree water starting around 280 fow and got better the deeper I went. 300/330 couple bites and bait
Same temp profile here. 54 degrees 100 ft down. Pretty much the same out to 220. Looked promising out in 160/170. Going to try again tomorrow. Late start this morning but will be out early tomorrow.