Crazy, It's been years ago that I fished Lake Chelan and I was shore bound at the time.
Didn't do real well except for Squaw fish.
From what info I've read or heard, You're better off in a boat with downriggers.
If you can afford it, there are some local guides that work the lake for Kings. That might be an option for you and your friend.
You could also drive to Wapato and bank fish and Alta above Peteros isn't that far from Chelan.
Craig