I've been thinking about a corner of this question, too, as students talk about where they'll be for the holidays. My question has been whether there will be some excuse made up for Harry to have to stay at Hogwarts for the holiday so that, as in canon, he could be in the castle with Ron for Christmas.

I'm waiting to see what the players choose to do about this. (Perhaps nothing. Perhaps Harry will just go home to Buckingham Palace and will have a bang up time exploring New London with Draco's Aunty Bellatrix and attending the Malfoy's holiday party and eating whatever his heart desires that Dennis can procure for him.)