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• Don't bring coolers, cans, bottles or backpacks.

• Do bring your ID.

• Don't plan to park in Soulard. Metro is offering a $5 shuttle from the Civic Center Metrolink station to Soulard from 9 a.m. to 11 p.m. Passes can be purchased at the MetroRide store; passes are available Saturday at many area Metro transit center locations. Laclede's Landing is offering a free shuttle from 8 a.m. to 10:30 p.m. from Second Street and Laclede's Landing Boulevard.

• If you're tweeting from Mardi Gras, tag your tweets with #stlmg and watch for updates from our reporters.

• Dress warm. Forecasts don't call for the River City Grand Parade to be rained on.

• Be a good visitor. Don't urinate on the streets, sidewalks or houses. Don't try to get served alcohol if you are a minor.

Gabe Hartwig is the creative director of Go! magazine. He also writes about bars and theater. Follow him on Twitter and Facebook, and find more recommendations by Go! on Foursquare.