Don't you just love those day!? I really like the high-key effect of these images. I find it hard to capture the absolute intensity of the desert sun in my images, but you accomplished it very well and might have just inspired me to experiment a bit.
On that note, my last trip out with the 4x5 was keeper per keeper. If it wasn't for taking doubles just to be safe, I'd say 4 for 4. In fact, I just printed one at 20x24 because I was so pleased.
Blessed be those days.