I was there a few weeks ago. We got a spot in-between France and Japan about 2 hours before the show and were right at the railing. Wasn't bad of a wait since there were a few other cool people hanging out that we were able to chat with, and we were able to high-tail out of Epcot by using the IG and walking to YC/BC to catch a rideshare (versus walking to the other end of epcot for x2 monorails to BLT)
The waits are going to be crazy near the center since the projections are more towards the American Adventure. If you don't care about seeing the projections, then anywhere is a good spot.