Yes there is but it's very simple hot dog hamburger ice cream. The Sheraton Sand key is next door
There is a permanent food concession stand, if they're open or not I do not know but you can call the park.
No
You're also minutes away (driving) from a densely populated area with shopping, Starbucks, Dunkin donuts, etc. There's even a Subway just before you enter the park. But the park is relatively quiet; just a small hot dog shack.
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