[Leo the Dog]

Regarding Mexican border towns, I would skip most of these. I have been to Nogales, Sonoyta, Naco. There's been a lot of cartel drug and human smuggling here, really not impressed with these border towns.

If you're considering going to Mexicali-Calexico, you may as well just fly into San Diego, take the trolley to San Ysidro border crossing, walk across the border and check out Tijuana.

Then drive on the 8 freeway to Southern AZ. Mexicali will be around 110 in the summer, Tijuana 75-80.