You can wear either. But I do recommend that you wear tennis shoes or running shoes, considering a lot of the time you'll need to walk, and if you go onto a rollercoaster, you'll need to remove them.
You can wear either 1
Yes. But bring shoes if you want comfort.
Yes, but not fun to walk around for hours in non comfy shoes!
Yes, but you have to remove them before going on rides.
Yes
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