The zoo is huge but they have many tour buses and ...

The zoo is huge but they have many tour buses and other ways to get around the big park like thier "skyfari" which is a ski lift sort of thing to get across the park. There can be a decent line at the skyfari but can be worth it to get off your feet and not have to walk as far. I would definitely recommend using it at least once for the experience. They have many places to eat at throughout and offer a souvenir cup that has free refills the whole day you bought it and can be filled at any place that serves soda throughout the park.