We have done it almost every week on normal but only 3ish times on hard. Inevitably someone always dies once we get a couple across. If we get 2 across, and we can't get the bridge built and the rest wipe, I don't count that as a cheese as it's just working with what you have. I hate cheesing. I don't play this game to get cheese through it. Doing it correctly takes skill and teamwork. I hate when our regular team isn't on because every LFG group I get in is the same story, but different flavor (cheddar, bleu, mozzarella, Swiss, etc.).