One thing I didn't catch and just re read was your going over Christmas, at that is as well as March break the most costly time of year to travel, but I didn't see that you mention 2 weeks, maybe I missed that too

I trusted you done your home work and serched many online travel sites for cost, and found the right deal for all of you.
Not to mention booking this far in advance as many like to do when travelling at that time and with so many

I need more details to search, but I do hope you and your Familys have a great trip

I have been in the DR over Christmas but I was alone so it would be way different then the family being there to share the Holiday still
