When you do your online "Set Sail" Pass check-in a set of e-documents will be generated and you download it from the RCI website. Access your booking and look the for 'cruise documentation' tab along the top. Go to that tab and you will see 'Guest Vacation Documents". The e-docs will include a luggage tag to print if you prefer that approach over having the porter tag them at the pier. Also don't forget to print your Set Sail pass.