>...suggest that the henge was the corral and the cursus the drove road. I dunno.<

Yep, I've argued this before, ie that Avebury was not just an important religious/ceremonial centre but a trading centre as well - perhaps the 'capital' of the Neolithic. People from all over the country would come to trade, drive their livestock along the Ridgeway to be sold at market at Avebury. Some of that livestock would then have been driven back up the West Kennet Avenue to the Sanctuary where it was slaughtered and perhaps processed before being traded out back along the Ridgeway.

That's just the simple scenario - almost certainly there were other things going on as well - trials, marriages, meetings, funerals, etc etc - in fact, just about everything that goes on in a modern market town. To think of places like Avebury and Durrington Walls as 'mystical' places of Druid/Celtic or whatever worship and nothing much else is beginning to look increasingly Victorian or worse... 'New Age'.