So this will be my 3rd time to vegas and im bring 3-7 friends (all there first time) with me May 22-27 for memorial day weekend. My last two trips were exploring vegas and then a gambling trip. This time i'm going for the party which i haven't done yet. Do the pre-sale tickets for pool parties and night club mean guaranteed entry? do you still have to wait in line? I honestly don't know what to expect other than it being a zoo. Advice and tips would be appericated.