Wilson,

1) I cannot comment since I do the work myself.

2) You will have to register your Vanagon in AZ if you are
   considered a full time resident by the MVD, and I think
   that you will be.  The AZ smog test is easily passed by
   a Vanagon.

3) I lived in AZ for many years without AC in any of my cars.
   In the summer, I tried to drive only at night, or first
   thing in the morning.

   I've had AC since 1984 now.

   For short trips, the AC doesn't even begin to cool you down.
   I usually don't use my AC going to and from work.  As I said
   before, it's OK in the morning, and my office is so cold that
   I enjoy the heat on the way home.

So, I assume that you will be at ASU.  I have a son and daughter there these days.  What are you doing your graduate work in?

Thanks,
Mike