Clear plastic bag. Just like in the rain at a festi. Looks bad but you can't stop a beer from falling on your stuff. I keep some plastic bags tucked away with all my gear. After getting stuck in the rain one time I didn't want to deal with that again. They also help in a bad neighborhood. Who is going to get jumped for a bag of garbage?
i keep sooo many contractor bags in my taping bag, at small/large shows, youre gonna need em eventually, nothing like running to a vendor at a festie for a few garbage bags
i even use them in smaller clubs in p-burgh ala the hard rock, looks weird but works efficiently