Blizzard Beach, Walt Disney World is one of two water parks in Walt Disney World. It has a wave pool, water slides, and a lazy river. There's fun for all the family and it happens to be the Hubby's favourite place in the world.
I would recommend arriving at Blizzard Beach with your swimsuit on, you'll be able to get changed quicker and beat the rush. You can hire a locker and a towel (unless you take one with you). and that way you don't need to worry about keeping your things safe.