While folks wait for these to be installed, there are a couple HPWCs at PRESS Wine Bar just west of the north end of the state park. I didn't get to use them last time I was down there because the road was super flooded.
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Wine bar is cute and has good food/wine, if a little pricey. They had either 2 or 4 HPWCs (parking lot for the wine bar is smallish so 2 of the spaces were ICE'd).