Sorry, a couple more thoughts regardin strategies:
For the Zoo, we like to go on the bus tour before we do anything else. That way we can determine what we want to see on foot. We buy the deluxe ticket that includes the bus tour and aerial tram. My first time there, our bus driver gave us good advice: "Ride up, walk down." There are a lot of hills, so they installed escalators. We ride up the escalators and walk down the hills. They also have a bus that can take you around that stops, but we don't use it.
For Sea World, I like to plan around the shows. It's been a while, but the map used to have show times. I would circle the times of the shows I wanted to see, then we would plan to view other exhibits around the show times.