I would actually say Louisiana, generally speaking, is as much "the west" as is Missouri in Tom Sawyer or Georgia in Song of the South. What complicates Princess and the Frog is both the time frame and New Orleans specifically. As long as they keep it to a more rural, bayou-based area, it will probably be fine visually, but elements that perceptibly reference the time period just after the film (or just modern sensibilities, broadly) will potentially be anachronistic, which is the danger. We're already seeing that a bit with the mural, though hopefully that will be mitigated in some way.