Dust down the sleep­ing bags and camp­ing stove, the start of fes­ti­val sea­son is only a cou­ple of months away. These days, music fes­ti­vals are work­ing hard­er to attract a fol­low­ing, offer­ing debat­ing ses­sions and work­shops, ban­quets and bal­loon­ing, hop­ing to carve out a unique and iden­ti­fi­able image from a sea of for­mu­la­ic events. Here…