Clumber Park is a good place if people are members (otherwise there is a charge). Parking is more restricted now so the best place would be behind Central Bark and walk back to Limetree Avenue. Earlier on in the race, Carburton Crossroads near the tea house is good, but due to road closures, this would have to be accessed via the A60 out of Worksop, past Welbeck Garden Centre to the left turn for Norton and Carburton. There's a tearoom on the crossroads too. It wouldn't be possible to get there in time if you wanted to watch the race start.
In short:- Manton Lodge layby just off the A57 near Wilkos. Park just outside the gate into Clumber and walk to the corner where Clumber Road meets the Old Coach Road, close to water station 3.
Clumber Park via Appley Head off the A614. Parking at Central Bark or the main car park and walking to Limetree Avenue. Non members will have to pay.
Carburton Crossroads close to water station 1, which is only accessible via the A60 Mansfield Road and Norton due to the road closures.