Yes, but there are several ways to get cheeper tickets.
The most common way is through a AAA office. If you know someone in the club, ask them to get tickets, they will be about $10 cheeper
Also if you attend in May or June, there are Pepsi cans that give you Discounted admissions, usually Sunday-Thursday. Last year it was $13 off in May and $10 in June.
Also if you stay at the resorts, packages are avaliable.
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Joe