If you are a fan, do you not think you would enjoy the concert sober? I attended a music event last year sober (of someone I was a big fan of). In all honesty, I did almost lose my sobriety on that trip..but that had more to do with being alone...when I wasn't supposed to have been...than triggered by people enjoying 'bevies" around me.
For me I am not so much triggered by others drinking...but rather when I am "emotionally overwhelmed", frustrated, angry, full of anxiety etc.
Will you be frustrated by the fact that others are drinking at concert? Will you feel left out? If you cannot be optimistic about enjoying every moment of Kid Rock with stone cold sober clarity (which is cool isn't it?)...I dunno.
(Of note: my stone cold sober clarity at the concert I attended last year? Ya..I am no longer a fan of the artist..sad but true)