Or a pair of roller skates in AZ. There are LOTS of AZ plates here in Cali too. Comes with their own risks and hassles. Best bet is to get a AZ drivers license and register it with a friend or relative's address over there. If you get stopped here you're 'just visiting'. If you have a CA drivers licensed you'll get a fix it ticket to transfer to CA within 15 days. You need liability insurance to ride on the road as well - also gets sticky with AZ registeries for CA residents.