Did I softlock myself?

I just got Lothar's quest to retrieve a skull from the catacombs, and used the fast travel that had just been unlocked to go to the Buried Village. Unfortunately, I didn't realize I wouldn't be able to fast travel back and did not have any junk in my inventory and thus I cannot use the portal to get back to Ragpicker's Square.

I'm 99% sure I have looted every piece of junk that was in the trash warrens, catacombs and areas beyond and stashed it in containers outside the area.

I don't have a save even somewhat recent. Is there any way I can salvage my game?