Magic Kingdom Park Hopper Capacity

Trying to plan out my park hopping strategy for the busiest week of the year, yay! I will be hitting the parks on 12/30 and 1/1.

My question is, will MK hit park hopper capacity on 12/30. Understanding it is impossible to know, but does anyone have experience from last year, or from thanksgiving week this year? From my understanding 12/31 is the most likely day to hit capacity. If it did hit capacity, around what time?

Since MK is open until midnight on 12/30, I would like to target it to be my 2nd park that day if possible.