Thanks for the advice, dude. My mom called around and talked to the manager, and he referred us to the site where we actually bought the tickets, and our money has been refunded.
Now, I feel special. This is from Andy's manager, Eric:
"Hi Travis, sorry for the delay in responding, we have been trying everything we can to get you into the show, but are having no luck. Andy and I will personally refund you your money (including ticketing fees.) Please forward me your address... so I can get this out to you immediately.
Just so you know we purposefully added a guitar clinic a couple of days ago as a workaround to hopefully get you in, but apparently state law and the venues age policy will restrict us. There was a lot of significant back and forth to making this happen for you and Andy and I feel bad that this can't happen.
Again, get me you address and we'll take care of you.
It's good to know that there are very responsible and very nice people managing the fabulous Andy Mckee.