MK is typically the busiest park in my experience so MK on a Saturday is most likely going to be more crowded than it would be on say a Tuesday. However, as long as you get there early and have a plan you should be good. It also has EMH that night so you could go to another park early and then hop to it later to experience the extra hours. Hope this helped...even though I was a little scatterbrained earlier. Good luck!