Trace Adkins and Susan Lucci are the narrators toward the end of your trip, and I expect they will be very popular. The pkg would guarantee you a seat with a shorter wait. However, you can get in line for the 5:00 and if there are no seats for that show, you stay in line for the next show. It's a lot of waiting, but you'll probably get in eventually.
Lorraine Braco and a yet-to-be-determined narrator are at the beginning of your stay. You MIGHT have better luck without the pkg with them, but a lot of that will depend on who that narrator is.
Going during the week as opposed to the weekend is also a better idea for lower crowds.