Been there, done that. Transatlantic Crossing on QE2 in Queens Grill with no luggage. I had a little black dress, black ballet flats and my jewelry in my carry on and did a mad dash around John Lewis for essentials. I did buy one dress on board and other passengers loaned me clothes. Each night when I arrived at the table for dinner I would tell my table mates what I would have been wearing, had my luggage arrived. My laundry was expedited and free for the duration of the trip. If nothing else, I have a great story to tell, even all these years later and people who remember me always ask about my luggage when I see them for the first time on any trip.