To answer your question,weapons are worm harnesses.To your other questions,with the water being colder than 50-52 degrees,people are catching walleye now trolling with crankbaits and casting with hair jigs.When the water warms to that 50-52 degrees,we switch over to trolling with spoons and casting with harnesses.You can catch fish casting onto reefs or in deeper water.If fish hungry,will bite in shallow and deep water.The junk fish and short walleye also start biting when the water warms past that 50 degree mark too.