Here's the link to the panhellenic web page at New Mexico State University.
http://www.nmsu.edu/~gogreek/pha/
They have 6 chapters that participate in formal recruitment (Alpha Xi Delta, Ceres, Chi Omega, Delta Zeta, Pi Beta Phi, and Zeta Tau Alpha).
The web page has alot of information. If you have any questions, just PM me, I have helped Theta Omega chapter during formal recruitment for the last 4 years.
The greek system also does a good job of publicity. The members help with move in days. They have signup tables all over campus before recruitment starts with manditory hours that groups must be at the tables.
Good luck!