Waterproof diaper question

We are going to Lake George and the Great Escapes website says that kids in diapers must wear a a special waterproof diaper. Wouldn't a Huggie swimmie work?
If not how do those waterproof diapers work? Does he wear a regular diaper under it?
Sorry if these are stupid questions.

Re: Waterproof diaper question

For most places you need to wear a swim diaper like Huggie swimmie, and then a reusable Plasticy swim diaper on top. We use this oneSwim Diaper
The Huggie doesn't hold in pea, I think this one does. It's just an extra layer of protection.

Re: Waterproof diaper question

Thanks!! I usually just use the Huggies but they come off right when we get out of the water. I wan't sure why the waterpark would have different rules.