I think you will just need to link the reservation to your MDE account and assign everyone in your party so you can get dining reservations and the early park entrance for resort guests perk IF it's happening by then.
Just a heads up, several of us have had issues with the reservation disappearing in MDE especially after adding it to the Bonvoy app, but you can add it back easily.
Are all 10 of you immediate family or is it grandparents or whatever too? What are the age ranges? I've gone with a big group before but it was grandparents, aunts and then my sister's family and mine so how you handle things could depend on the answer to those questions.
Thanks for the info!
It's just us. 8 kids from 25 to 5. And two parents, much older.