Yeah, bigger cranks, or lures in general, might help to keep them from munching on the line. I've never tried it but I'd imagine putting 2 steel leaders on would be fine...as long as the fish don't mind.
Another tip: In the Fall, I like to head up into the bays to catch pike and bass with buzzbaits. I'll use two rods, one with a plain white buzzbait, and the other with a plain black buzzbait. Right at dusk (last full hour of sunlight), Try casting right into the cattails, moss or stumps and rip that buzzbait right through it! (use the white bait for areas that are still sunny and the black bait for the shady areas)
HANDS DOWN, the most explosive, spectacular fishing there is! I've had northerns jump clear out of the water to grab my buzzbait hung up in a cattail. I don't know why they would ever think a minnow would be stuck high in a cattail, but i'm not complaining! LOL