Keep the roots damp the first year Howie. Whatever it takes.
At our new place here in central Az, temps in the 90's and 100's, I have rocky clay soil, have mulched heavily with straw, and water a couple of times a week. In a year or two, I hope to cut back on the the water.
At our old place in Lake Havasu, it was hotter and the soil was rocky and sandy. When the temps got over 110, I watered my new plants every other day.
A moisture meter can help, but in the desert...when you see otherwise healthy leaves start to wilt...it's time to water. Even if you just did it yesterday.
Mulch heavily. Use shade cloth the first couple of weeks after you put them in the ground, and keep those roots damp the first year.
It wouldn't hurt to have your soil tested, at (least the ph), either. That can save you a lot of work and $.