I have not fished Chelan since I was a kid, but we clobbered trout on bait.... eggs or worms either from a bobber or on bottom, they seemed to be everywhere. There are some big catfish in that lake too that you might catch as bycatch while trout fishing.

If on a boat, You could probably sight-drop bait to fish 50ft down since the lake is so clear..at least it was back 20 years ago.
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