I used to use PhotoBucket till they started charging. I've posted photos since using Flickr, but that site can be a little tricky when you're trying to import photos here. I don't do it very often, so have to keep playing with it till it works. I'm posting these two photos to show you how I did your photo, and also to remember how to use Flickr. I set the size of my photo to 10" wide, 100 resolution, then uploaded to Flickr. Once uploaded, you open your photo in Flickr, click share, choose "BBCode" and change the output to the size you want. The first photo I posted at "medium (500 x 313)", the second at "original (1000 x 625)", then copy the link. After pasting the link directly in the message box here, you delete all the gibberish before the [img] which is embedded in the link, and everything after the [/img], which is also embedded in the link. Clear as mud yet?? It works, but it's really clunky. There may be a better/quicker way, but that's the way I know at this point.
Bill