We've done Thanksgiving week MANY MANY times...probably about every other year for the last 10 years or so. We did Easter for the first time this year...NEVER AGAIN!
We find it doable, if you are willing to do some early morning. Our last trip was in 2016 with my brother and family and two young nephews for their first trip. I didn't push too much for early mornings the first few days, but on Thanksgiving Day (our last full day) I insisted on a 7am out-the-door time and while they initially thought I was crazy...they changed their tune when we had a nearly EMPTY Fantasyland for a while. We've also done just about every other month from Jan-Dec at one time or another. If you are lucky, you'll have weather nice enough to swim...at least we have in the past.
Our go-to for Thanksgiving Dinner is actually BOMA...we love it there and it's great for large groups. This year we will have 15 of us for Thanksgiving Dinner there.