I was there the first time they did Idol at Aulani. First, I suggest NOT going to see it, and if you do don't bother lining up. You can see it easily from the beach as it is as far right as possible if you are looking at the ocean. By as far right as possible I mean while staying on Aulani property, it isn't in front of the Four seasons. They also had some decorations that were out of the way (big metal I D O L letters). The eliminations were in the Luau area. I watched them from my balcony with binoculars trying to figure out who was getting crushed and who was making it on to the show. I was generally wrong in my guesses lol. All in all it makes no difference to your trip imo especially if you don't waste time waiting to see the show needlessly.