There’s a whole thread about important dates here: http://talk.collegeconfidential.com/university-alabama/1784243-important-dates-for-entering-freshmen-and-future-applicants.html
I’ve seen most people suggest Camp 1831 and/or Honors Action (or Outdoor Action or Black Belt Action). The Action programs start August 12. There are two session of camp 1831 (August 8-10 and August 13-15), though you can’t do the second session if you do an Action program .