That's a good idea provided you can cope with a houseful of people AND your own kids! I found it a nightmare taking my son anywhere over Christmas time because he was
overexcited and a real handful ... all quite normal but very wearing!
These days we stay at home so we can take as much time over opening our pressies and eat when
we want to. We go and have a Christmas meal at the in-laws a few days before Christmas Day ... this time it was the weekend before ~ it works really well for all of us I've found.
Naturally no presents are opened then, they're saved to be opened in a mad frenzy on Christmas morning!

Sounds like you've got a frantic day of activity ahead of you ... all that eating, drinking, eating, drinking, opening pressies and yet more eating and drinking *phew* ... you'll need the rest of the break to recover!
