It also depends on which week of March you will be there. Schools in Texas take their spring breaks the 1st or 2nd full week of March. I was there last year for my spring break the 2nd full week and it was CL8-10 days. We “hopped” from EP to MK after EP closed at 9 for MK’s EMH because they were open until 2AM. MK’s EMH are almost always on Wednesday nights and during a holiday week, you can expect the park to be open later than usual. The crowds during MK’s EMH were not bad.