Have had a lot of success with the Lighthouse mega bites. White Russian is dynamite. Tip it with a little salmon belly or scent. 8"-10" Hali haws do well in whites, browns or greens with anywhere from a 8,12,16oz lead head works. I tried adding a trailer hook but found it would snag bottom a lot more or get tangled up in the tail. Depends on depth/currents. Sometimes they like the 4 legged or 2 tailed jig as well. No idea what it's called but it's got two bigger arms, and a little tail. Keep checking for bottom and keep it 5-10' above it. Like people have said, it's a lot easier to jig down hill than up. If there's lingcod down there, they'll jump on pretty quick. If not, change jigs or move on. Once you've hooked up, keep their heads in the water as best as you can otherwise they freak out. Keep them in the swim then gaff'em. My old mans nets them because well, he's old. But they'll trash a net quick.
Look for kelp beds or pinnacles. Kelp beds seem to always hold a linger or two. They feed on anything, especially rockfish, so where there's little fish, there's bigger fish. Have found some areas up north of Quadra with some fast water, always seem to produce. Back troll to keep lines vertical, keep moving a bit and hunting for them. I prefer eating ling over halibut any day. Anything under 15lbs is great eating. If you do catch a big one, let it go and let the big females keep breading. They're very resilient fish but keep'em wet as best as you can.