I think it looked more like Union Jack to me, which didn't really register since it'd be incongruous on a trucker hat.
I can just imagine Ron and Hermione in this world. Hermione would be the girl-next-door without much for brains but a lot of other assets. Ron is, of course, a hick-town jock. He wears shitkicker boots and drives a fifteen year old Camaro. Harry always rides in the back when Hermione's in the car.
They play REO Speedwagon on the cassette player (no CDs for Ron).