I don't usually bring my DSLR to the beach or water parks. I do have two options for when I am near/at water
1- My Sony TX20/30: Waterproof P&S camera
2- I own an underwater housing unit for my older Sony NEX 5N [gives me Manual control similar to my Full Frame A7]
If you are going on Splash Mountain and don't plan on taping the big plug just get a plastic bag from one of the stores. Put it into the bag and wrap tight.
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