I have worked many college camps over the years. From Major D1 to D3. The coaches evaluate the players. Everyone of them. At the first break the coaches start talking and the talking never stops until the camp is over. Who do you like? Did you see the kid in the blue T-Shirt? What do you think of the Jones kid? You know the kid with the #27 jersey on? Wow what about that Smith kid?
You can send all the information you want. You can send all the letters you want. Unless you do something to set yourself apart it will not matter. You can show up as a total unknown and if you do set yourself apart THEY will know all they need to know about you before you leave. You can bank on it.
Your attitude. How do you carry yourself? Your hustle or lack of it. Your approach to instruction and coaching? Do they like the way you go about your business? Do you have a tool or tools that stands out and catches their eye? Do you show them something that makes them want to know who you are? If you do you can bet they will make sure they know who you are before you leave.
At every camp I have ever worked there have been some kids that the coaches wanted to meet, get to know and get information on before they left. If you want to be one of those kids then show them something they need and look for in players.
Coaches get excited about what they see. Be ready to show them what you can do and don't worry about if they know who you are before you get there. Make them remember who you are before you leave. Good luck