how do local sororities work?

[SWTXBelle]

There are undoubtly many different clubs and organizations at your new campus which will give you an opportunity to be active and involved. You made a pledge to Tri-Delta, the details of which I do not know, but I imagine that they included one to make Tri-Delta a life-long part of your life. Don't turn your back on that pledge, or on your sisters. You may well be able to be a part of an alumnae group, or you might have to go a year or two without being active in Tri-Delta, but once you graduate you will find a world full of Tri-Delta sisters. By all means make yourself an active part of your new campus, but it would not be fair to Tri-Delta OR the local sorority to join another sorority, imho.