Granted the Oktoberfest hasn't even been on for a week yet, but so far the smells have been bearable. There was concern with the smoking ban that noxious smells would permeate the tents after sweating bodies and spilled beer wouldn't be masked. Some tents have attempted to alleviate this issue by installing fancy exhaust systems and even using bacteria eating microorganisms.
While technically this is the last year the smoking is permitted inside the tents it seems few people actually are taking advantage. Those that do smoke will not be served - or perhaps kissed, so once again beer reigns supreme.