We have a very co-operative Farmers agent in Arizona, who has known us for years. He keeps our insurance down to the bare minimum, which allows our Arizona plates to stay on the vehicles. On the odd occasion that we head north for a trip, he brings our coverage up to the full level, dropping it back down when we return south. The annual cost of doing this is nominal and allows us to head north with no problems of where to find insurance, which would be liability only anyway. However, most people seem to let their insurance and plates lapse. It all depends on your tolerance for risk etc. We are more comfortable keeping everything current.We are planning a permanent move to Mexico. What suggestions do you have in regards to keeping some level of U.S. auto insurance in case we decide to return to the states?