http://www.harley-davidson.com/wcm/c...p?locale=en_us
Here is the fly and ride program for Harley-Davidson. I would recommend if you want the dry states(you didn't say when you were coming, so be aware these dry states are hot May-Sept!) you fly into Albuquerque, New Mexico, U.S.
From there you can make a square up to Colorado, over to Utah, Nevada, California, back to Arizona, back up to Albuquerque, New Mexico.
Fabulouse sights not to miss on this route are the Grand Canyon in Arizona, and the Southern part of Utah's landscape...all of it!!
If you go to Harley-Davidson.com you can also find "Ride Plan" and plan it all out with each stop, mileage, etc.
Have fun!