Out of interest, is it worth putting a few AI cars into the race as backmarkers to pad out the field? Just been reading BeachAV8R's review of the 2006 2.4 hrs race which featured 7 AI cars and 6 human drivers, and seeing as the actual race features 55 cars we're certainly down on numbers. I'm not pushing for them either way and I imagine some will be dead against it, but if numbers are a little disappointing it might help to just add a little extra to the race.
I am never in favor of adding rFactor AI, especially in multi-class events. In real life slower yield to faster ones in a usually-predictable manner. In rFactor, not so much, and it would be a shame to see someone punted by AI. They also run in tight packs, resulting in the fact that they don't fill out the field too much.
I really hope more people sign up for this event so that it can take place enjoyably.