Just heard about this, which may be worth going to see before the race arrives
http://www.surreyhillsroadracefestival.com/content/timings-mens-and-womens-races
http://www.surreyhillsroadracefestival.com/content/timings-mens-and-womens-races
I am planning on going to Richmond Park on Saturday, but I hadn't even considered being there as early as 7am (no doubt being horribly hung over).
Our plan was to cycle down (or at least close) to the Sheen gate, hoping that it will be least used entrance, and get there for the return leg. There's so much empty road side there's bound to be a space somewhere.