Very little is done in the parks for Mardi Gras. BUT if you happen to be staying at Disney’s Port Orleans you will get to experience some what of a parade!
Some of the cast members of the resorts build floats out of golf carts. They parade around the resort throwing trinkets (beads, candy and doubloons) to the guests that line up to watch.
If you will be staying at Disney’s Port Orleans on Mardi Gras (Fat Tuesday), be sure to ask the front desk when and where this event will be taking place!