With, every time. An assessment without participant transport removes 65 to 85% of actual emissions and makes the figure incomparable with any sector reference. Good practice is to publish the complete assessment, clearly distinguishing directly controlled emissions (venue, catering, production) from transport-related emissions (indirectly controlled through location choice and incentives). This transparency is expected by public specifications and corporate sponsors.
Read the source article: An event's Bilan Carbone®: categories, figures and measures