Stroll into EPCOT at dusk, you'll have no issue getting in as they never hit phased closing, make your way to the back of WS and just chill there. As the night goes on, Canada through UK and Mexico through China become a madhouse. But if you just chill in the back of the park it's all good. I like to hang around Italy for the dance party
Edit: on topic, I was in EPCOT on the 23rd in the evening and was shocked at how NOT crowded it was. No line for the bar inside Mexico, no line for food at Electric Umbrella, no line at guest relations, and we had fast passes for MS and Soarin. It was a great 4 hours in the park topped off by the fireworks.
I. LOVE. being. Local