it was all over news today that some stations in Lake Buena Vista Florida (Disney World) were charging @ $5.89/gallon. Lake Buena Vista is actually part of the greater WDW complex, has a captive audience, and this week is mid-winter break for a lot of school districts up north, so they are taking advantage by gouging.
I actually saw a station in the middle of Yosemite Park, that was charging $5.35 / gallon... in July 2007.