Free: Contests & Raffles.
Examination of the screw threads and threads in the barrel is critical. You might be able to clean up the threads in the barrel if they need it, but it will take a BOTTOMING TAP (which your dad probably has). If your front sight is not a fiber-optic sight, get one. Putting a dark sight on a dark animal that is standing in dark brush is nearly impossible! When I put a Williams Fire Sight on my Hawken, it made a huge difference.
All a gunsmith or Traditions will do is what has been suggested by other guys already. If the screw is stripped they will replace the screw, if the hole then they will open it up to the next largest size or if the hole is deep enough they will put in a longer screw. If it is the screw Traditions will likely send you another at little or no charge. Just fix it the best way you can. I would not personally take it to a smith for that little fix. I would say just fix it, you want the sight to be on permanent so why not J.B. Weld? Another temporary fix would be Gorilla Glue, it would work better than super glue.