We've been there twice. Once on an air package to Harrah's, and you know about the shuttle to Horseshoe/Roadhouse/Gold Strike (MGM, but next door). Once we rented a car in Memphis. No cabs, but we've seen a lot of business cards in the hotels for taxi/limo companies (usually just one person with a car), you can call them and ask them to drive you from casino to casino. As I remember, the prices were generally fair.