Howler (Minneapolis), tUnE-yArDs (Oakland, CA), Doomtree (Minneapolis), Trampled By Turtles (Duluth, MN), The Hold Steady (Brooklyn, NY) June 16th, 2012 Walker Art Center in Minneapolis, MN 89.3 The Current  Full Gallery: Walker Art Center Rock the Garden 2012 The stage was set for one of the biggest shows of the summer and all eyes were on(…)