Hi Oldfart,
The ground was certainly HARDPACK.
On the first few laps as I flew down into each gully I had to stop to see if my tyres were flat. The front felt like the tyre was trying to roll off the rim. There were a few flat tyres and Peter G blew out the front as he dived into a gully, this sent Peter over the bars. As the grass was cleared away by spinning wheels the rocks elevated to the surface, some small enough to be pelted at my helmet camera while the larger ones remained like iceburgs in the ground kicking the suspension in awkward directions.
I went as fast as I could but in the back of my mind I sure did not want to get too friendly with the ground.
Ji