Basically all sink tip lines, spey and single handers 7 - 9 weights, 9 foot to 13 foot rods.
Mostly nymph.streamer and spey flies are used.
Did C+D for first 5 years fishing michigan, learned how and where they were, and reverted back to purist fly fishing techniques the last 15 years.
BTW, any one ever caught a summer run on a dry ? I won't even ask about winter runs. Read a Dave Richey article recently who has been fly fishing since the 1970s for great lakes steelhead said he has never caught one on a dry fly in all those years of guiding and fishing through out Michigan.
Very low probability of success in my opinion.