I was at Organ Pipe National Monument a month ago to capture the Milky Way. There wasn't any clouds in the forecast, but I got some very nice Anti-Crepuscular Rays. It was a great way to end a great night of photography.
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.