Sorry for the lone delay in replying however we were gone for a spell and I'm back now attempting to catch up before I head out again. End of poor excuse.
Thank you for your very kind words regarding the work and I'm very pleased to see that you got an image you are equally proud of. While clouds are great smoke will do just as well if there isn't any clouds. Actually I've found that smoke will sometimes help enhance an otherwise dull sunset to make it stunning. We had several overcast days while in Jackson Hole and one day we went out to where road crews were burning a pile of brush and was able to incorporate the smoke into the image. Take it anyway you can get it!
Looking forward to seeing your image please let me know when you post it.