Dino Perrucci stood in the pit for some of Gregg Allman’s most seminal latter-day moments. A New York-based photographer known for his loving onstage shots and candid offstage images of Allman, Warren Haynes and the other members of the Allman Brothers family, Perrucci was a fixture at the Allman Brothers Band’s annual Beacon Theatre residency, as well as at shows and festivals throughout…