All I can say, is the line for dinner package holders in of itself is HUGE and forms early. And all the seating is first come first serve in terms of where your place is in line. You are guaranteed to "get a seat" with the package but that it. The earlier you get in line the better seats you will get. We got in line an hour early thinking "this is overkill". Nope. We were behind tons of people and were sitting far off to the side and towards the back by the time we got in. Granted, this was for NPH.
And the stand-by line folks are only allowed entry once all dining package holders are in. At my show it sure looked like only a real lucky few stand-by line people, would have made it in, they would have been stuck with really fringe seats/split up/filling in little gaps, etc and they must have been in their line for hours to be at the front of this queue and actually have a chance to get in. (this is where the cast members start doing their "can everyone please shift to the right, filling in all available space spiel", and all the people who spent hundreds on dinner packages, AND waited in line for a few hours to get prime front and center seating are like "heck no!" and don't budge).
All I know, is I wouldn't want to be one of those stand by line people, having to wait for hours and no guarantee of a seat, let alone a decent one. Its a nice little holiday show featuring a celebrity, but IMO not worth HOURS of your time, IMO, when there is plenty of other things to enjoy in the park.