Nice review, I too kind of half expected Libby to pop up at the mental institution. And I'm sure that when Ana Lucia was mention during his questioning by her former partner that Hurley was flooded with mermories of Libby then.
I don't think Locke was there at the cabin when Hurley came up on it, or could it be the house just sudden appeared and Hurley goes to check it out and sees Jack's dad, and suddenly an eye appears in front of Hurley like whoa somebody can see the cabin. Then Hurley freaks and starts to run away then pow the cabin is back in front of him. Then along comes Locke go to or coming from wherever, I think if Locke was aware that Hurley was at the cabin I'm sure he would of said something then.

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Standing in the ocean with the sun burning low in the west
Like a fire in the cavernous darkness at the heart of the beast
With my beliefs and possessions, stopped at the frontier in my chest
At the edge of my country, my back to the sea, looking east