Yes, you'll always read horror stories out of Korea, however I think things are getting better. I also think that people sometimes get a kick out of posting negative stuff and maybe embellishing it a little. I just spent the last three years over there and met loads of foreign teachers who were doing just fine, but that rarely makes the news, eh? No doubt some people have difficulty due to a lack of research on their part, difficulty adjusting to the culture, and in some cases just bad luck with their choice of employers.
Will you have any free time while you are back in Korea? If you do some research it may well be worth taking a day trip to a potential employer. Do you want to leave Korea and then come back at a later date? Could you spare some time after the summer camp to engage in your search? If the answer to some of these questions is no, then there will be little advantage in being there as far as I can see.
Good luck !