We joined in with their parade a couple of years ago - Steve, Patrick & I drove along with them with our Carawagon roofs up!
We had found a small site to wild camp before the Doncaster Classic Car show on the Sunday - the land owner who let us use his land, just on the edge of Wroot, asked if we would join their parade on the Saturday.
I do remember the roads to Wroot were probably the worst I had come across in years
Cheers,
Robin.