Wedding Rehearsal Attire Poll

I’m playing piano at a wedding on Saturday at Lambeau Field in Green Bay, Wisconsin. The attire for the rehearsal is “Packers jerseys and apparel.” Should I sort of play along and wear a neutral green or gold t-shirt (but not a Packers shirt), or should I wear my Cris Carter jersey, or some other Vikings t-shirt? Or should I really twist the knife and try to find a Vikings Brett Favre jersey somewhere along the way to Green Bay? Please vote and discuss. 🙂 I should add that one other member of the wedding party, who’s a Bears fan, has been “banned” from wearing Bears gear, so will supposedly wear a Bears jersey underneath a Packers shirt so that the Packers shirt doesn’t burn his skin, lol.
Also, if anyone by some slim chance knows of chords/music to “Skol Vikings” for piano/keyboard, please let me know. I’ve been Google searching for them but coming up empty!