I’ve had some limited experience in that system, not on Lake Seed. If you’re planning to fly fish for them I expect you’ll be looking up the river toward Lake Burton.
I had caught a few accidentally over the years and last spring I fished for them on purpose and caught two fish on each of three trips. So I’m hardly an expert. I used a 300 gr sinking head with white/gray and chartruese/gray clousers. I used a slow swing like for steelhead (I guess)–cast across, upstream mend, try to get the slowest, deepest swing possible. The place I fished had clear water and long stretches of channelized flow over small cobbles and gravel. Fish generally occurred in two feet of water or so, late in the day or at dusk, and bit near the end of the swing when the fly was moving slowest. If I stayed late, I could sometimes see the eyes of fish in shallow water reflecting in the light of my head lamp.

G