smokeminside,
I agree with #1 Assistant Coach. In addition, I would confirm they are going to be at the camp and ask what other showcases or camps they will be at this summer. Very rarely does a coach make a recruiting decision or put a recruit on a watch list after seeing a recruit just one time. It is usually after multiple times, mutual interest achieved, and a dialogue is started between the coach and the recruit.
Also, when the time is right have your travel coach, high school coach, Legion coach, or pro scout ready to speak to an interested recruiting coach. It never hurts to be prepared to make his life and your life easier. A great reference can speak volumes about his ability, character and work ethic.
Good luck!