If it's like the CP packages, you'll get a sticker at the restaurant that will entitle you to stand in the package guest entry line for the show you're assigned. When they open the ropes to the theater, they will let the package line in first, and then the general public line. The closer you are to the front of the package line, the better chance you will have for the seat you want. If you have the package and you arrive after they let the general public in, you lose the early entry advantage (meaning they don't rope off a section or anything for the packages - you just get to enter before everybody else does.)