We went in September 2009. I think there was just one scheduled for the week before we got there. During the week we were there they not only added another one later during the week but they added a 2nd showing the night we were there. We couldn't get a F! DP (was also during FD) but our TA got us into 50's Prime Time at 4:30. We got in line around 6:30pm and they started letting us in. The line was sectioned off to one side and the walking vendors were on the other side- selling drinks, beer and snacks- Hubby waved his hand frantically and grabbed one- by then other guys
were hollering for him too.
DD noticed she no longer had her Star Wars Princess set from the store and started crying, so I waved DH on with the kids while I turned around and literally wound my way against the crowd back out (yeah, like I really was going to find it still sitting on the floor outside Star Tours or in the 50's restaurant we had eaten) Going back in was not as hard, the majority of the crowd had already sat down, plenty of seats along the sides and back. I'd say took me half hour to go out and get back? DH and the kids were mid center, 12 rows from the front near the aisle- great seats I shouldn't have worried. By then we were hungry again so DH went to the concessions in the stadium and paid OOP pretzels, hot dogs and drinks.(Hindsight I'd rather bring CS dinner in than to eat a really early TS dinner)
An hour's wait isn't long when you're eating. After walking around on an extremely hot and humid day, it was really nice to sit back and just rest tired, aching feet. We struck a conversation with a family from England who was visiting for 2 weeks, who tries to come every year and always sees Fantasmic! The crowd started doing the wave, someone had a beach ball, and it was a very lighthearted, expectant crowd.
The 2nd showing was 9:30 and the line was long, down the hill and curved around but as other people have pointed out, the stadium is huge so I doubt that one was filled to capacity.