Idaho is indeed a beautiful state, flyncloud. We love towing our Airstream there from Santa Barbara, Ca. We also welcome visitors from Idaho to our beautiful state. I must say that the only hostility we have experienced toward us, has been while in Idaho, however. A US citizen does not need a passport to travel to Idaho. I fail to understand how a person in this country can act so possessive about a particular location. At what point have you earned the right to consider Idaho yours? Do you need to have Native American ancestors? Much of Idaho is Federal land. California taxpayers contribute more tax money to Idaho that is collected from Idaho citizens. The same is true of New Yorkers, for that matter. If our California license plates provoke this unpleasantness, we will happily spend our money somewhere else.