Before the music starts, before the crowds fill Two Rivers Park and before the beer tent becomes one of the busiest gathering spots at Strawberry Days, Rolf Hermanson is usually somewhere nearby, helping make sure the festival is ready. Hermanson moved to Glenwood Springs in 1999 and began volunteering with Strawberry Days around 2003, the same year he joined the Glenwood Springs Chamber Resort Association as an ambassador. More than 20 years la…