Hi. Sorry that your initial experience did not work out. My piece of advice would be that if the topic regarding your previous recruitment experience were to arise that you give a simple but honest answer. I'd keep the personal details (members and big sister's names) out of the conversation. In other words stick to the general information and avoid details that should remain private. Hopefully you have had the opportunity to become acquainted with members in the other NPC groups through classes, on campus activities, work, dorm etc...
Good luck with formal recruitment.