I think it depends on which Fairfield Inn you are staying at. I've never been charged a resort fee at any FI. But I have heard that all the resorts at the Marriott Village (a new complex consisting of a Fairfield Inn, Spring Hill Suites, and Courtyard at I-4 and the Downtown Disney Hotel plaza exit) charge this fee. I stayed at the Spring Hill Suites in January shortly after it opened, and they didn't charge at that time. The fee was instituted later.