Hi there, I hope you have fun at the fun water park. You can use a tampon if your comfortable with it, you should be fine. I know lots of people who wears them swimming & are perfectly fine. Just take extras in case it gets too soak you can just use another one. Have fun for me too. Hope this helps
Tampons are great to use, I started using them when I was 10 years old and on a competitive swim team (I was lucky and got my period at 10). I agree that taking extra tampons is a good idea. Have fun!