I've trolled turds and bigger scud hootchies with 80 good quality mono pounds leaders when I am expecting a chance at bigger hali or lots of lingcod. Works great. Caught tons of springs doing that too. Keep it short, 36 inches or less as you are likely going to be trolling slow and have a big heavy siwash hook and swivel combo inside the hootchy, plus beads or puckies, etc. I've put scent on and used the little flashing light deals, didn't seem to hurt or help noticeably. Scent is critical if anchoring or slow drifting though.
If moreso targeting springs on the bottom, with a chance at a medium to small hali, I'd go with 40 pound fluorocarbon.