I managed to get there today after leaving Suffolk this morning.
Was a fair bit smaller with nothing on the University Campus although there were a lot of sidecars on the Tritton road University car park when we left.
I took a couple of pics of those unusual Sportsters on my phone as I left the camera at home.
The blue one looks like it could have been a prototype for the Rocker C
And the seat looks like 30 - 40s retro.