Loud--
I don't understand how going national is going to help your situation. I don't need to tell you this, but you all have to pull together and make Phi Gam successful and THEN ask campus to expand. Otherwise, campus will not see the need to add another national to your campus. Also, once Phi Gam expands, you may not WANT to go national, which is something to think about. I would seriously work on getting more women involved and getting new members. Get your 5 officers, pay your IGPB dues and get going to Panhel.
You're right that you can't do it alone, but you'd be surprised to see how many women you can get involved if you're all positive about the experience. Best of luck, and PM me for anything.