Trying to figure out if I should adjust my trip days

Hi everyone,

We are taking my daughter for her birthday next year and booked our park days for 10/31-11/2 (her actual birthday). I'm getting a lot of conflicting information about park busyness and wanted to get some opinions from more experienced park goers. I realize weekends and Mondays tend to be busier, but I'm also seeing that generally "party days" are a bit quieter during the day than other days. My hope is that Saturday (Halloween) at Magic Kingdom isn't terrible before 4pm and that Monday might not be as bad as usual because (hopefully) people who visited for Halloween are leaving and people who want to experience the Christmas stuff won't be arriving yet. Is that overly wishful thinking or somewhat based in reality?

Thanks for your help!