Am I Cheating?

As I've been playing around with some new software I discovered a technique for easily adding some clouds to a cloudless sky by adding a Cloud Texture Layer to the sky.  Believe it or not, I've never "added" any clouds to my photos before despite the fact that I like to process my photos pretty heavily.  It was really easy and took me about 2 minutes.  I tried it on one of my favorite photos that unfortunately had a boring sky.  What are your thoughts?   You can see the original photo right below.

Valley of Fire State Park, Las Vegas, NV.  Shot with Canon 7D with 24-105mm 4.0L lens on tripod.  

Original photo from my Print Gallery.