We love sea world, and think the 2 day tickets are great. One year we went ahead and spent the little bit extra and got seasons passes, and then planned another trip for later that year. It will be hot, so be sure that you dress the baby for that, and remember that it is still not easy for them to regulate their own temperature, so taking her in and out of the stroller will help. I would suggest not using the pumpkin seat, and just laying her in the stroller and clipping a fan to it to help rotate some air. Even getting her wet some should help. I would plan on a double stroller, or at least a sit and stand because it is a lot of walking. And the water park is lots of fun. We wore swimsuits with coverups for most of the time and just went back and forth some. We also spent exrta for the dinner with Shamu and the kids loved it. BTW, several of the shows use water and get members of the audience pretty wet, so dont sit in those marked areas for sure if you dont want to be sprayed. At the beginning of the 1st day, I recommend splurging for the big plastic cups for drinking, and then we just asked for ice and put water in them throughout the day. The next day, we took them in already filled with something, and only paid for a soda refill once each day. We still have the cups and use them from time to time. We also stuck some snacks in the diaper bag, which helped. Overall, it should be a great time, and when it gets to be too much, admit defeat, head back to the hotel for a rest, and try again later. If your son will nap, and then stay up late for some shows, it is cooler then, so it might work out well. Have lots of fun! ~A.~