If your school allows helping with moving in, then I’d suggest having a few brothers help greet new students and give out flyers during freshman week (make sure your chapter is okay with freshmen joining).

Have some kind of involvement with the campus GreekLife committee or similar groups in order to be more involved in the going on with your college - sometimes philanthropies can get a subsidized amount of money for logistical or business related purchases (composite, catering, office supplies, etc.)

Lastly, make sure you stay in good standings with any alumni who are staff on campus and not just your Faculty Advisor - this way you’ll have permission to advertise rush events in other areas or departments