People grab all of the free areas early and lay their towels to claim em. You can rent cabanas but they aren't really worth it unless your planning to stay at the cabana, i.e. not to wait in the queues for the slides all day.
Yes you can rent a cabana
I don't believe you can. If you have a Diamond membership You can reserve an area. You can also rent a cabana. Other then that the park seating areas are first come first served. Throughout the park there are areas with grass or areas with concrete. They have chairs all over the park for your use. If you get there early you can find a great place to relax when your not in the water.
You would have to call the park to reserve a section. If you only want one table it's first come first served.
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