The 9th circuit opinion did comment that it was "odd" to consider a parking lot a "sensitive place" as Scalia used the term.
The Nordykes argue that the Ordinance is overbroad
because it covers more than such sensitive places. They list
the areas covered: “open space venues, such as County-owned
parks, recreational areas, historic sites, parking lots of public
buildings . . . and the County fairgrounds.” The only one of
these that seems odd as a “sensitive place” is parking lots.
It's not the only one that seems odd to me, and given the history presented at the case, it seems that a sure way to prevent any future shootings at the fairgrounds would be to hold a gun show there that never closes.