Persistent heat and unforgivable humidity couldn’t put a damper on the 15th annual ROMP Fest held at Yellow Creek Park outside of Owensboro, Ky. from June 27-30. Continuously gathering the best in bluegrass, old-time and roots music, the festival’s 2018 iteration featured headline and standout performances from Alison Krauss, Leftover Salmon, Billy Strings, Love Canon and others. Missing earlier sets on Thursday from the likes of Doyle Lawson & Quicksilver, bluegrass state native Ricky Skaggs and his band Kentucky Thunder and others, I arrived just prior to Colorado music and ROMP veterans Leftover Salmon. The group opened their set with frontman Vince Herman singing about the state’s rolling hills and…