Umm, I spend A LOT of time at that airport.
It is owned by civilians. Despite what NFDC says, Plant 42 is one of several tenants on the airport, and hasn't been the owner for more than a decade. United Airlines ran not-very-profitable shuttle service there for several years, not a common thing for a "military" airfield.
Having said that, landing without PPR is not a wise idea. PPR is not limited to military airports. If you land at NUQ (which is also civilian, though it's still US government), you will be unhappy as well.