Welcome carmenloofah! Yes, you have to subscribe to APUG to upload photos to the gallery, but, I believe (and someone correct me if I'm wrong) that as a 'member' you can attach an image to a forum message without subscribing. If you see a little paper clip icon at the top of the message box as you're typing a message, I think it'll work.
If you don't have a scanner or access to a scanner in order to create a digital file of a print, negative or slide, you could bring your print, neg or slide to a lab and have them put your images onto a compact disc (CD). You can then download the images of the CD onto your computer and then upload these images to the APUG gallery, or where ever you like.
I suppose a reason to use a copy stand would be to take a photograph of a print that is too large for a typical scanner and then have the negative (of the copied print) scanned to a CD.