I think Star Wars guy is right on.
Robmpg's suggestion is probably good to try, but if you really, really want to do it, I'd make it my first stop. That is one l-o-n-g, miserable line for a not very awesome ride.
It takes a long time to load and unload the ride, and the cars travel at an uneven speed (one driver may be faster than another), which contributes to the line.
PS: Edited to add: No, it is not worth waiting in a long line for.