If you want to go without a package, strongly consider the 5:00 pm show and get in line at least 1 hour before the show. Not everyone knows about the show and once the first one starts and people become aware of it, more people may try to spontaneously see it. Also, since you have to eat before the show with the dining package, the eating times for the 5:00 pm show are not the best. So, there is probably the greatest chance of having less "package holders" at that performance.
Just my $.02!