Good luck with your meeting IGS!
Also, there is the "Locals" board on GC that I'm sure will provide you with tons of information.
I would also recommend you check out:
http://www.geocities.com/localsororities/
which lists local sororities all over the country, I'm sure you'd be able to contact other women who have embarked on the same path though this fabulous site.
Good luck again,
violets