maybe she can carry it

take it don't take a chance that she may need it. Pray and trust that all will go well

I would say Yes take it. You will be in an unfamiliar place which may set off some behaviors so having her blanket may comfort and calm her down at night or even during the day. It may also help keep her calm on the plane when you are flying.

We took my son's tent with us every time we slept in a different place. It helped so much that we were able to sleep at night knowing he was sleeping and wouldn't get up in the middle of the night.

Let us know how things went.