Great story mate! I'm only 14 and me and my dad a similar situation ,
Didn't meet God (bob) but I met his band ... On the Australian tour 2011, me and my dad went to every concert, this was the Adelaide concert, we went to a door which i think led down to the backstage, and a man walked out, it was a cook for the venue, we offered him $1000 dollars in cash to give him for him to let us down to see bob, he was very tempted but didn't take it (we didn't have the money, but you never make Anyway he said he has Steak and red wine. After the concert (which was incredible) me and my dad got a tram up into the town, we sat on a bench for about 1 hour, we met B.B. Kings drummer who supported him. Anyway as time went on i seen charlie sexton come out the hotel (the hilton) having a fag, We went over but it was to late. So we just went inside the hilton, this is gods honest truth, there was no security, there was a woman at reception, we asked her for a pen she gave us one, didn't ask who we were or anything, we looked over at bar and there was his band! We couldn't believe it, we walked over, and we was there for about 10 minutes, they was so nice to, was asking us questions, charlie sexton was explaining how he played All along the watchtower. It was the most amazing night of my life, wouldn't have been if bob was there, but we came very close..
I don't know how to put pictures on , cos' i would.Wish I was as lucky as your son.