I'm sorry to beat this dead horse, but are you saying that if you use a towncar service to get from Port Canaveral to WDW, you can't put your bags into the hallway on the last night of the cruise and then pick them up in the baggage area of the terminal? If so, why?
No, not at all. I take mine when I disembark so I don't have to look for them in the holding room. You can certainly have the DCL crew take them the night before and you can get them there, it's your choice. I take mine so I can get out earlier. I've done it both ways.
Pam