I was stationed at MCAS Yuma for 3.5 years , it is where I caught the Bronco bug from my buddy McGuire.
I want to say we went to the Buttercup dunes , all I recall is they had their own exit off of I-8. Not a damn thing there except the frontage road and the dunes.
Those sunsets are spectacular , I used to get greeted by sunrises like that every day on my way to my work station.
You have definite calander shots there!
Any chance you can send me a HQ version of those sunset pics, they will make for awesome desktop backgrounds.
Thanks ,
HD