Sea runs are totally different from any trout. I had the hardest time figuring them out. Forget indicators and dead drifts. Swung soft hackles, buggers, small steelhead wets and skated or twitched caddis drys work well. They will hit a dry when nothing is hatching on the water. You will also find them in lots off different water types but not usullay the fast shallow riffles often targeted for other trout species. Slow back eddies, under cuts, modest runs with large boulders and any slower water with cover is typically where I find them in the river. Retrieving a streamer or wet fly casting up stream and retrieving down can be a productive approach as well. Most of my experience has been fishing the alsea river.