I don't believe so, festivals despite looking like they are organized by one entity outsource things to different suppliers. This makes it super hard to track the different metrics needed to calculate carbon footprint.

Direct emissions might be feasible but the indirect ones is where things get super fuzzy. If I hire company X to drop off équipement and material to à specific location, then hire company Y which installs the needed infrastructure using the équipement delivered and so on... You find yourself with a Tree branches of data that needs collecting ( not to mention quality of it).