Joomla and Drupal can be overkill according to what you are doing.
If you only have a few pages that you want CMS'ed, consider something much smaller like CutePHP : users, categories, avitars, permissions, templates, comments...
When it comes to gaming/clan websites CutePHP and likenesses are used far more often than Drupal and Joomla. However I have yet to find a CMS with a small learning curve.
If you have considerably more than that you might want to go for the mainstream CMS like Drupal and Joomla, they have all of that, extensions, themes, and a versioning/rollback system. These CMS are much larger in file sizes, but are consistently known to 'just work'.