Oh that's awesome, glad to hear things are going well.
Part of the beauty of local sororities is the autonomy and self-determination/direction. But that can also be the downfall. That whole, "with great power comes greater responsibility" bit. Right now, you don't have an alumni group watching and making sure you're keeping things on the level, so perhaps enlist a group of advisors (staff/faculty of your school, perhaps community leaders?) to just act as a go-to person/people that are removed from the group. Once you start establishing alumni, then there is less and less need for this sort of oversight (although, it could be a nice gesture to initiate/honor initiate those that helped you out in the beginning).
From local greek to local greek, just be mindful that people are watching you, expecting you to fail or to step out of line. Don't give them that opportunity. You've done a tremendous amount of work, and you're reaping the rewards. Don't let anyone take that away from you and your sisters.
Welcome to the wider sisterhood of local greeks, we're here to help however we can.