Slowly but surely, Trampled by Turtles find their audience...by Chris Drabick...Minnesota's Trampled by Turtles play traditional music in a nontraditional way. Since the band moved from side project to full-time gig in 2003, its five records have split the difference between revved-up bluegrass and Townes Van Zandt-style ballads. The recently released Palomino debuted at No. 1 on Billboard's bluegrass chart. But the Turtles made their bones onstage, where the five members are the hardest-working band to ever stay seated. According to singer-guitarist Dave Simonett, their caught-between-worlds style makes them stand…...