From the horse's mouth, i.e., Section 562.11, Florida Statutes....
"...he or she was of legal age to purchase or consume the alcoholic beverage and the appearance of the person was such that an ordinarily prudent person would believe him or her to be of legal age to purchase or consume the alcoholic beverage and if the licensee carefully checked one of the following forms of identification with respect to the person: a driver license, an identification card issued under the provisions of s. 322.051 or, if the person is physically handicapped as defined in 2s. 553.45(1), a comparable identification card issued by another state which indicates the person’s age, a passport, or a United States Uniformed Services identification card..."
Under Florida Statute, a passport should be sufficient. However, if Disney wants to ask for additional proof of age, I'd be prepared. Please note that Florida Statute doesn't state copies of said acceptable documents are permissible.
"...he or she was of legal age to purchase or consume the alcoholic beverage and the appearance of the person was such that an ordinarily prudent person would believe him or her to be of legal age to purchase or consume the alcoholic beverage and if the licensee carefully checked one of the following forms of identification with respect to the person: a driver license, an identification card issued under the provisions of s. 322.051 or, if the person is physically handicapped as defined in 2s. 553.45(1), a comparable identification card issued by another state which indicates the person’s age, a passport, or a United States Uniformed Services identification card..."
Under Florida Statute, a passport should be sufficient. However, if Disney wants to ask for additional proof of age, I'd be prepared. Please note that Florida Statute doesn't state copies of said acceptable documents are permissible.