We have an RV and own a home in Arizona. We leave in the spring and come back in late fall. Basically, we're gone from our home in Arizona for about five to six months of the year. Arizona licenses are quite expensive, so this year we went through a mail service in Rapid City, South Dakota. We were able to apply and get our license all by mail. Now we need advice on whether to change our drivers license to South Dakota and whether we should get our towed car also licensed in South Dakota. I am sure there are many of you in the same situation. This is all new to us.