If you are pre-registered with DME you don't really NEED anything but a photo ID.
I've never needed a photo id, just the magic band
I've never needed to show ID, even before Magic Bands. You'll be fine with just your Magic Bands.
The point of my answer is that guests do not need a MagicBand or any kind of paperwork… IF they are pre-registered with DME.
If they show a photo ID (or otherwise validate who they are,) they can get anything they need (including a ride to their resort and bags sent there) from DME.
If you HAVE a MagicBand, that's fine.
If you HAVE the DME paperwork, that's fine.
If you HAVE the yellow luggage tags attached to your bags, that fine.
BUT if you DON"T have any of those things with you.
(You forgot to bring them. You accidentally packed them in your checked luggage. You never got them in the mail. Etc.)
You can still use MDE.
All you need is to identify yourself and they can look up the rest of your info and issue the bus tickets on-the-spot.
AND If you DON'T have the yellow luggage tags attached to your bags, you can just hand the CM at the DME check-in desk your regular airline luggage claim checks and the DME folks can collect and deliver your bags using just those claim checks.
SO this is why I said that if guests are pre-registered with DME, they do not NEED a MagicBand or any kind of paperwork, if they just validate who they are.