If you have any issues about Dolphins after watching the shows and if they should be set free, do not go. I must admit, I have my own issues on that, but the name sea world is for a reason, and that said, you will not find an Iguana as the main attractions.
It can take a while to get to the gate, but overall the lines move fast especially if you are driving in. Try to find a hotel in walking distance, and most in the area offer shuttle rides at a set period.
My concerns, is that it cost a lot, and sure, the wonderful employees must be paid, but I guess if you are a local family, struggling to make ends meet, and without a school trip, you can only watch the rides form a distance and imaging and this include the Kennedy Space Center.
Note: Try to stay at a hotel that offer an easy pass to cut a few lines, for a selected number of rides. It is like a VIP, but everyone ends up on the same area because the lines can be very long. So, do not schedule a date, and believe you will be out of there soon.