No, that is not correct. Here is luggage tag information:
If you have
Disney Cruise Line transfers from the airport to the port and are arriving on May 10: put your luggage tags on before you leave home.
If you have
Disney Cruise Line transfers from a resort to the port: Do not put the luggage tags on your bags before you leave home. Put them on your luggage on May 10 before your luggage is picked up to be transported to the port.
If you do not have Disney Cruise Line transfers: Do not put the luggage tags on at home. Put them on your bags before you go to the port on May 10, regardless of how you get there.
If you do not have enough luggage tags, you can get more at the port but everything given to the porters at the port must have luggage tags. Otherwise,
DCL won't know what room to take your bags to.