Okay, so I was doing a little sleuthing and I think the correct date of the Higher Ground show is 2002-09-21. I looked up Seth Yacovone on the LMA and there is a show on that date and if you click on it, there is a jpg of the concert poster showing the date and that PB was the opening band.
https://archive.org/details/syb2002-09-21But, there is a show played at Club Caroline in Saratoga Springs listed as 2002-09-21 and that must have occurred on 9/20, seeing as that's a Friday and they played two sets. But, I don't have a way to confirm that, as of now!