Good for just you. Each entrant to the park needs their own pass or ticket. There are no group admission passes. Some of the pass options have certain days where you can bring a friend for free or at a discounted rate, but you would have to read up on how that works with each pass type
Probibly two
1 per person .can use to buy merch n food at a discount for friends n parking .if going together you only need 1 for free parking
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