damn, those zetsu clones are useless.
question: does Kabutoro control each clone directly? I don't think that there was a time when all the zombies met Kabutoro and each other, so wouldn't it be a smarter move to have someone "pretend" to be a zombie and spy on them through that?
there's no way that Hanzo would care to learn the identity of the rest of the zombie army, so you could probably slip by him and say "Kabutoro's orders, let me pass".