A few more details;
This would be ideal to bring kids along to, as the speed will be walking pace. I think we would be placed towards the tail end of the parade. In recent years there has been a line-up of vintage cars following along at the back, and the idea is to have cyclists either instead of or supplemental to the cars as a statement on progress and sustainable transport in the city.
We would need to be at the start for 11am, and it would take about 3 hours altogether to the finish. Then, if people wanted, there would still be time to do an afternoon spin. Or we could just go on the rip either.
If anyone has any questions let me know, I'll answer them as best as I can.