I’m going to guess that you’re probably post HS, and maybe even 2nd or 3rd year BM. If thats the case, many of the sleepaway camps lose their older bochurim in Av to other jobs where they have camps. Make some calls now, and see if they will take you on as a madrich / rotator for the 2nd half. Also, check with your friends to see if they know of openings / cancellations. If your flexible, you can find something.
As a last resort, check the classifieds. There is often a part time job in a neighborhood office that is looking for someone to do lite office work. Not the most glamorous summer job, but at least its clean work.