Now that I'm on the road a lot I play the game myself. I've notice some things which might help you do even better when you play license plate bingo. It all begins with paying attention to the trucks on the highway.
To begin with, you'll get Maine and Oklahoma rather easily. For whatever reason, probably registration fees I presume, an awful lot of truck trailers are plated either Maine or Oklahoma. While Oklahoma may be fairly easy to spot on cars, Maine isn't, being small and tucked away in the far northeast of the US. With this tip, it's an easy gain of one relatively hard to find state.
It's also easier to find various plates if you look for the name of the truck line. If a truck trailer is blue (although it may be white) and says WERNER, it's plated in Nebraska. If the trailer is white and says SAIA, it's from Louisiana. Heartland Express trucks are plated Mississippi. It works every time: see those trucks, you gain three states.
This works for Canadian provinces too. If a trailer says 'Moe's Trucking' it will have an Ontario plate. With Bourassa or Normandin, the plate will be Quebec. Spot Bison Trucking and you'll gain Manitoba. These work every time too.
And that's how you can gain several states or provinces easily when you play license plate bingo. But one more caveat. If at the top center of a plate you see spelled out U-T-A-H, all in capital letters, it's from Utah.
Now go play the game and enjoy these easy and exciting tips.