We are driving from Phoenix to Carlsbad in one day, in beginning of June this year. We will make a quick stop at Saguaro National Park, and then spend the rest of the day driving to Carlsbad, NM, as we want to go to Carlsbad Cavern the following day. We are quite capable of driving 10-12 hrs in a day. Does anyone have any suggestions on which routes we should take to best accommodate the limited time we have to absorb the beauties one can view from the driver seat? We can also drive by Guadelupe Mtns, so will check that out too unless someone has any better suggestions. Thank you!