Somehow I missed that earlier.

The Silver Pass does include parking.

How often would the cup dispensers be stocked? Would it be like the ice in the freestyles where mid day they're hard to find? 

If you plan to visit more than once the gold pass is a good deal. Tickets for specific days range from $40 to $47 depending on the day. The gold pass is $100 and includes free parking, free drinks, 15% discount on food, merchandise and photos and more. The Silver Pass doesn't include parking.