Best not to come, but to send us your tickets instead
One idea which isn't as crazy as it first sounds, it to pack clothes that you can happily lose en-route. If you have Med beach clothes that you do not have to take back home, you can get them cleaned on the ship, then drop off at the first charity shop you see, thereby helping others.
This will then free up space to either buy replacement "nice" or "throw-away" clothes. We have lots of cheap but good clothing stores in Europe, so you could again buy as necessary, then dispose of them as you prepare to return home, which could work out cheaper than getting them laundered ;-)