@CAS239 are you sure about the rentry with a single ticket? I think reentry into the same park is one of those exceptions that is higher up in the phased closing you can't get in list. If it gets full enough, yeah there is a chance they will not get back in and OP leaving epcot at 9:45 is probably not the best idea or time to do it.
There is no guarantee you will get into any particular park regardless of where you are staying or your ticket type. You are only guaranteed entry into a park, not a specific park. That being said Epcot has a very high capacity so it is less likely to happen there than at other parks.
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