I don't know if folks here will tell you anything different than what is obvious. Go out and meet people! Recruit from classmates, ladies that live in the dorms, whatever!
In a place like this, however, your best course of action will be to take the time to become prospective members friends. Not for the purpose of recruiting them, but for the purpose of getting to know them (it's called networking).
You may not recruit the individuals directly into their organization, but you will greatly expand the population from which you can draw membership and interest. You'll have the opportunity to meet their friends, etc...
Or you can do what my group did in our colony days... We set up a table in the UC and just started to talk to folks as they walked by. Used the table as a way to get initial contacts. Made a few new aquaintances on campus and we got quite a few guys through that.
I'm a member of a large national fraternity, but I don't think it changes how recruitment works. You recruit your friends (or people you'd want for friends). The more established you are, the easier it will become. Y'all will basically be working your butts off for the next few years to make your organization viable past the time you graduate.
Good luck
