More Color

The predecessor to this image was posted on ES&S yesterday but it was suggested that this was the more appropriate gallery. The original was shot while I was helping the local scout master with an overnight camp. I saw the potential but wanted more dramatic skies. When I saw the clouds building during the afternoon one day last week I got my commitment over as soon as possible and jumped in the truck. It's an hour from home. I got there in time to grab this. I decreased the saturation in the sky by about -10. Any suggestions would be appreciated. Thanks.
Canon 450D
Canon 55-250 @135mm
ISO 100
F10
0.6 sec (-1 comp)