I am visiting San Antonio for work, and I have a very short window of free time. I'd love to go to either Sea World or Six Flags. I'll have only a few hours on Saturday evening, April 2nd. I won't be able to get into a park until 5pm at the earliest. They both say they close at 9pm- do they really kick you out at 9, or can you continue riding rides after that? My hotel is right across the street from Sea World, so that's a plus, but I don't care about any of the shows or animal attractions, just rides/coasters. Would it be worth it, or should I spend some of my short window of time traveling to Six Flags? Do you think the crowds will be horrible on a Saturday evening in April? I appreciate any advice you can give! Thank you!