We stopped at the Grand Canyon a few years ago on a road trip back from a visit to Southern California to visit family. It was in January and there were sprinklings of snow everywhere. The weather was nippy on the south rim!
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.