Using Photobucket, go to the photo album where you see the thumbnails of the pictures you want to post. Hover over the thumbnail and a little gear appears in the top right corner. Hover over the gear then select "get links" then click in the line under "IMG Code". This will copy the link to your clipboard. Paste that line into the Text box here. The trick is you need to delete the part between the first set of square brackets and the last [ URL] or else it will show up as text as you can see below:

The first image I haven't removed the URL code
[URL=http://s985.photobucket.com/user/crwindy/media/rainbowfix_zps7fe9d311.jpg.html][/URL]

This image I removed the URL code

BTW, nice pictures