I would definitely plan to GO on the day it closes early. It’ll be much emptier than the day before or after bc people lose their minds and don’t wanna pay “full price” for shortened hours. You’ll get much more done in 8hours than standing in long lines for 12. And then hop to EPCOT or somewhere if you really want more evening park time. And hop to MK another night if possible for fireworks. I know that probably not your ideal plan and requires park hopper but those early closure days are amazing