My recollection from a Thanksgiving cruise years ago was that not much was made of it. They had turkey and dressing on the dining room menu that night. That is all I can recall. I hope someone with more recent experience can help here. I'd say the Thanksgiving experience will be the same on all RCI ships cruising from U.S. ports.
Glad to see you are breaking the grandkids in right! Never too early to infect someone with the cruise addiction.
I see you'll be platinum members after the October cruise. You'll like the extra perks.