We have done Thanksgiving 3 times, this year will be our first Christmas cruise. We booked Adventure when they were first released and only paid $3800 for 6 of us in two balconies, I was shocked at the price (got the same price for NYE next year).
For Thanksgiving week 2022 they had a tree lighting as well as Santa and the Grinch taking pics with passengers. On Thanksgiving we were at CocoCay and they had someone dressed as a turkey and someone dressed as a chef and they ran around the port all morning, it was entertaining. Then the ship captain pardoned the turkey that night. It was cute!
We are planning on bringing some solar Christmas lights and a tiny tree to decorate one of our rooms for Christmas, as well as some door decorations.