when it asks for a url, that means the web address (http://www.yourphoto.com/pic.jpg), it's only if you have the picture already online somewhere. otherwise, what you did, attatching the image via the paperclip icon is the only way.
berkshire valley has pockets of prime right now. the maples are really showing off. the burning bushes(we have some wild growing patches) are a beautiful pink right now too.