Our first experience with showing up at the pier without luggage tags happened last month. Faster than I could say "we don't have tags" the porter whipped out some tags and attached them to our bags. He then asked to see my SeaPass and he put my name and cabin number on the tags. I pulled out a pen and helped. Just like that...it was over in a minute and we were on our way to the check-in. This is not something I will ever again worry about.
Oh, and we got all of our baggage delivered before the emergency drill happened.