1. Yes, bring swimwear and towels because there are two rides on which you can get wet (even though the main water play area hasn't opened yet).
2. The entire park is cashless. If you're bringing kids who aren't yours and their parents sent cash with them, stop at guest services (at the entrance to the park), where they can take the cash and put it onto a visa card. (This was an issue for our party, and I had to pay for stuff twice with my card and have the kid pay me back in cash -- super annoying for budgeting).
3. Food in the park was quite a bit more expensive than I thought. Our visit was early July 2022. At the time, a little cup of ice cream was 5.99, and a cone of ice cream was 7.99. A cheese pizza was 10.99; pepperoni was 12.99 (or was it 13.99). Those were the cheaper options for lunch. There are lots of stuff that was much more pricey.
4. I was impressed with the amount of shade throughout the park. As someone who burns very, very easily and quickly, it was nice that a lot of areas for standing in line were shaded. (But still bring a hat and sunscreen!)