If you're on a smartphone (android) access aw via chrome, use the app version - all pics can be saved to phone via a long press on the picture itself. A pop up then asks if you want to save.
By far the easiest and least faffy way to save pics in my opinion
You then create a folder on your phone - move all the photos in there, put a . In front of the folder name then none of the pics turn up in your gallery. Download an app like perfect viewer to view the downloaded pics. Hey presto hidden collection of aw pics on your android smartphone