Try to get some leaves and small twigs on your clothes, this way if anyone smells alcohol you can very normally explain that it's just the sticks and leaves, some high school campus drunk must have spilled some beer on them and they got on you when you took a shortcut, or maybe it's some sap, anyway no big deal
Also make sure to calm your nerves by being drunk when you're explaining this or else it might not make sense to your brain and you'll mess it up