I have found that to catch the lunkers in Elk on the troll, use the biggest lure that is reasonable. I favor a #9 jointed Rap in Perch and have had good results with this size in black/silver as well. I fish with a buddy who insists on tying on a 4'' Tomic (usually in frog) when trolling this lake. Five (maybe six) years ago, I remember a two month stretch (June/July) when there were a large number of +20'' Rainbows caught. One evening we caught three over 20'', the biggest being 24.5''. Just couldn't keep them off the hook. Even the guys pulling ganglies (gang trolls) were pulling big fish (which is unusual). Haven't seen the like since. Perhaps a bunch of brood stock were released here, though this seems unlikely as the nearest hatchery is Duncan. Perhaps a bunch of experimental tripliods (electrically sterilized) all matured at the same time. Nothing about Elk surprises me anymore (anybody caught a Piranah in there yet?). The biggest trout I've heard of out of the lake was a 26'' Rainbow, caught in the spring on a Chiromonid. That said, if you are pulling plugs, keep 'em big.