@ guitar Hi, I´m not an expert , but I can tell you, that I met a guy after the show in Munich and he told, that he went to the location in the afternoon and waited for some roadie or crew member outside. He asked one of them, whether Joe B could sign his guitar and the roadie took the guitar inside and came out later with the signed guitar. Unfortunately the guy wasn´t let inside .
Also I met another guy after the show , who waited in front of the bandbus to let his guitar signed by Joe. We waited about one hour together, we had nice discussions, also with other fans. Finally Joe came to the bus and the guy got his Goldtop signed and he was happy :-)))
As I said, I´m not an expert, but I don´t think you get a "date" for a meeting. Don´t know if there is one of these "Meet & Greet"- s , which I read about here, that they happen in USA before every show.
But imo there´s a great chance to see Joe before and especially after the show . Of course , I can imagine , it´s a little bit difficult to organise to take the guitar with you to the concert.
O.k., would have been easier to write this in German ;-))