Park at one of the theme parks then keep your receipt then drive to the other when you are ready to hop.
I forgot to mention that I'm an AP. I was thinking maybe park at HS then bus or boat to Epcot. Return trip by boat to HS. Pick up car.
Maybe bus to Epcot (quicker)?
I don't believe that there is a bus between HS and Epcot - unless it was added recently. Either drive, take the boat, or walk along Crescent Lake (body of water that the boat uses)
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