I'm flying from ALB to BWI on Saturday morning, and going to a wedding in Baltimore Saturday evening. I plan on bringing my suit with me. Is there any decent way of packing my suit so that it's still wearable once I arrive in Baltimore? Any tricks to packing it in a suitcase? Or would Southwest be able to accept a full-length garment bag (and would that even do any good, considering what checked bagage goes through?)

Any tips from those who often travel with suits is much appreciated...