I'm sitting in my Paradise Beach T-shirt as I'm writing this!
DH and I have been to PB twice and we LOVE it. We are beach people and find it to be safe, clean, friendly AND the food is amazing!
Like others have said, they do not charge a fee to get on the beach for for use of the chairs/umbrellas however, they do expect you to purchase food/drinks so bring CASH!
Also, another tip I can give is to bring water shoes. The area DH and I sat in front of was rocky and we were glad to have had our water shoes.

It made going into the water effortless. There were countless people who didn't have them and had difficulty going into the water because of the rocky parts. But if you bring water shoes, it will not be an issue!
We did not use the water toys as we just like to swim, eat and sunbathe.
It is a beautiful beach, awesome food and DH and I cannot wait to return!