Its all well and good to give answers and throw dates out, but more important than the A or B answer is the justification behind it, and the thought process behind why your prognostication is why it is. What is driving crowds to certain dates, and why? Thoughtful answers like that will help the reader much more, and help them plan better going forward. The thought process is the important part, not just getting raw answers for one particular case.
Touring Plans is indicating Thanksgiving would be worse than Black Friday, but I'm a little surprised. I would have thought that they would been deadlocked with Black Friday getting a slight edge. Big time holidays are brutal at parks for sure, but the days surrounding them usually hit more (assuming that they're still part of natural school breaks) unless there's something that the park is doing specifically. Granted, Touring Plans doesn't really provide insight, but just provides historical data raw pegged to the expected date (with some changes due to changed circumstances). In general, with Corona, I'm not believing a word they're saying, as there's not enough data on Corona crowds yet. And either way, I tend to care more about logic and patterns rather than daily historic data. Again, I care about improving your thought patterns rather than blindly going off crowd calendars.
Since people are overwhelming picking Thanksgiving. I'll leave it to you guys: what specifically is driving your pick? What is making people desperate for MK on Turkey Day over the Door Buster specials? Is MK doing something Thanksgiving specific for the day?