How would you decorate this tree for a ceremony?🌳

This is where I'll be married in a couple weeks:) the tables and chairs will be removed for the ceremony and my fiance and I will be next to this lovely big tree. Then the tables put back for the reception.

But it's half grown into the wall and we would like to decorate it tastefully.

We can't wrap anything around the trunk because it's inside the wall and we don't have a ladder for the top limbs but I'm open to any ideas anyone has?

The event will end just after sunset so not too worried about lighting but cute lanterns are on the list if we can get them on those limbs!😆