It was my first 200 ever in 2013 and it was cold and anti-clockwise. For non-GPS types that direction seemed to work really well as nearly all the junctions after it got dark were "L at T" or "R at T", allowing us to just cycle with no fear of missing the next turn. In 2014 (the flooded year) it was clockwise and I think the post darkness route was a bit harder to follow from a route sheet.
Overall anti-clock gets my vote..... so maybe it's time to do it again.