You have a lot of wonderful chapters to choose from! My only advice is to ask questions, be yourself, and follow your heart, because it really is true that you will end up where you're meant to be.
If you want to know any information about Alpha Gam nationally, you may want to visit our IHQ's website at
www.alphagammadelta.org, or you can of course ask us here. Oregon State is our Phi chapter and was established in 1921, so it has a long history.
Lots of luck to you and please keep us updated!