There last few posts bring up a good thought....you just can't be sure what happened to late arriving luggage. It may very well not have been DME's issue, but in all actuality, the airlines. If the bag got misdirected, then it's going to be a lot longer than 4 or 5 hrs!! And many times, no one will take responsibility for that lateness!!! Drives me nuts.
This is why we always recommend packing your carryon bag with anything you may need to start your vacation. And that doesn't mean just when traveling to WDW!!! If your checked bag gets delayed, you will at least have a change of clothes and something to sleep in...as well as toiletries. I know that when we flew home from Fort Lauderdale one NYE, we got diverted to Philly....no landing in Providence. Because we were heading home, I didn't pack that carryon correctly. And when we got diverted?? We could get off in Philly, book a room and get out on the first flight in the morning. BUT..they didn't have time to take off the checked bags!!! I had nothing in my carryon for the evening. So, we stayed with the plane, back to Ft Lauderdale, booked a room for the night, got our checked bags and flew out again first thing in the morning. Could have just stayed in Philly if I had had what I needed!!!!
So, pack those carryon bags accordingly!!!!