You've probably already seen it, but in case you haven't: her talk at 30C3 was excellent and is worth a watch. https://www.youtube.com/watch?v=R-2k6TMPMRo
Funnily enough, this isn't the first time Oona's RDS adventures have been on HN[1]. Indeed, there's a comment from a while back on here[2] from the time I was trying to convince her to submit to 44CON. The thing that really surprises a lot of people is that Oona does this sort of thing in her spare time.
Also WiFi totally rocked on day -1, but if you want that I guess you could also go wired any other day (symmetric gigabit and the best abuse policy in the world yay!).
But of course you can also travel on the day it starts and miss a few talks, it's up to you and your family how much of an issue it is to miss 2nd Christmas day. I was home in plenty of time for new year though, you still have that ;)