Any Tips on Talking with Nurse Recruiters?

Hello! I am going to be a new grad in the spring and I have recently attended a job fair where I was able to get some contact information for various nurse recruiters at the hospitals I am interested in. I would like to begin contact with these hospitals so that at least they have my name in their file system.

However, I am not sure what to say when I call them. Do I call and ask to set up a time to speak with the recruiter? Should I e-mail them first and then call? I am not sure how to go about this. At the job fair, I did have many of my general questions answered. What else can I talk to them about that would show my interest and would lead to an interview?

Anyone with some advice would be much appreciated~! Thanks =)