sam, I'm sorry she's behaving this way. She's trying to control anything and everyone in her life right now because she's out of control herself.
I would text her back when you have the time and advise her of your plans. If her family is coming in from out of town, it could be that they need to make travel arrangements soon. She has divided up the camp, so to speak, as to her family being her family and since in her mind you are now the enemy, she doesn't want you anywhere near them. That's unfortunate, but generally the way the mlc mind works and the family is the same way. Family and friends become possessions during the crisis.
I know it's difficult, but please try not to take this personally. It's her, not you. One thing...stop trying to contact her unless it is an emergency. If she contacts you, sit on the calls/texts for a while and then respond. She knows that you are sitting there waiting for her to contact you. Her majesty needs to learn that life isn't all about her and that you have a life that is just as busy as hers.
Sam, take back your life and plan to do things w/your family over the holidays. Trust me, she's going to miss you while you are away, but she may never admit it. Do not share any details of your holiday w/her...she needs to see that the street runs both ways for now.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.