Find a website like tintdude.com and follow the links.  there are lots of web sites out there with all of the states laws on tinting.  and btw, there are rules for light transference (ie. darkness ) as well as which windows can be tinted,

As for hot climates, I go to arizona often and do not like to take the vanagon since the time that one of the plastic connectors on the coolant lines melted in the middle of nowhere with my wife and 3 kids in the car while it was about 110.  Then again, this is mostly because I have another car that I like to drive on long trips better, not a total lack of trust. It has made the trip without incident. Charlie.

In a message dated 8/24/00 12:41:51 PM Mountain Daylight Time,
dmc@cyburban.com writes:

<< Also what is the best type of tinted window film to have fitted.
 I was told its illegal to put it on the front side or back windows, but
 saw lots of vehicles with it on there in Phoenix recently. Is this the
 law or is it just not enforced?
  >>
Here in NM they install on all windows except windshield. Even though it's
legal in one state I heard you could get busted if you just pass through
another where it's not legal. Ask a tint shop when you get there about the
law and brand of tint that's best.(prolly 3-M)