I agree. One thing to note about National Organizations expansion policies is that some may not even consider a local group or coming on campus until there are at least 25 women interested or petitioning. Stability is key here. Work on your sisterhood, and strengthen the group. A National Organization will not save anyone, you have to save yourselves first
The thing also to remember about "choosing" a group. All NPC groups must follow NPC expansion policies to the T, whether it's Tri Sigma, Chi Omega or another group. Most groups have internally also their own goals with expansion. Some will not expand to groups with smaller than a certain number of students on campus. Some will only do large, medium, or small schools respectively. Keep that in mind.
Have a great one and get out there and find some new women to become your sisters and enjoy each other as well.