No need to use imgur. You can just post them right on the forum.
Just click the 'Attach files' button on the bottom left corner of the reply window, browse your folders to find the photos, and attach them to your post.
If the photos/filesizes are too big, you may need to resize the photos first.
The plus side of doing it this way, is that the photos will be permanently attached to the post (no chance of broken links with missing photos somewhere down the road, like with photobucket/tinypic/whatever photo hosting site).