OK, just looked at the website for the first time.
1. How the hell do you get to the start and get home?
2. Note Newlands is about halfway and cheeseburger time 
3. Whether I do the big ride or not, assuming I am cleared by the medics, I will run at least one beginners guide training ride through the Surrey part of the route, starting and finishing at Newlands Corner. I will probably cut off the Dorking bit coz it's tough to manage riders when not in an organized race and will pop over Whitedown and get to Boxhill via West Humble instead. Back through Bookham to rejoin the route. Usual gang/newbies etc welcome. And Melds. Mwah!
4. Newlands, Holmbury drag from Abinger, Leith and maybe Boxhill are the only significant climbs I can think of on the route (plus Whitedown on the training bit).
5. Special request for Ferrets special talents.