I live in Illinois, which is a 2 plate state. Let me give you some advice.
Do i use 2 plates? No. When i got my car, i ripped the bracket off. Makes the car look so much better. Most if not all cars now come with a bracket, and they don't make 2 holes in the bumper. I've been driving for months now without a front plate and I have never gotten pulled over. One thing is, if the cop is going the other way than you are, and the road is kind of busy, they more than likely won't even bother, there are more important things.
If you do get caught, and you do get a ticket, it's like $70 - $90 around here.
What kind of car do you have?