Mississippi Hare.

Bugs Bunny, asleep in a cotton field, is picked up by his cottony tail (which a worker mistakes for actual cotton) and bundled into a shipment put on a riverboat going down the Mississippi River. After seeing a steward forcibly eject a ticket-less passenger, Bugs acquires some clothes and presents himself to the steward as a top-hatted gentleman. He finds one in the Yosemite Sam-esque Colonel Shuffle, a neurotic riverboat gambler played by Billy Bletcher.