In addition to the rise of one day ID Camps, there are now a large number of "combines" organized by recruiting agencies or individuals. They will promote the idea that a variety of college programs will be in attendance. There is of course a fee for an individual to register and participate. Before attending, make sure the college programs you are interested in are going to be there. You may want to reach out to those programs to make sure. Sometimes the "College Coaches in Attendance" list is not updated. For example, I have been listed on the current attendance list at a few of these combines and I haven't attended them for years.