Yeah, definitely don't park at EPCOT and watch Fantasmic unless you want to commute back to your car after a long park day, since the North Skyliner gate at EPCOT closes with the rest of the park.
Definitely not speaking from experience there.

Fantasmic is an incredible night-time show and an E-Ticket attraction in its' own right. Highly recommend that over basically any other nighttime show besides Happily Ever After.