The Whitwell car park is the one we always used. Do it anti-clockwise, i.e. head toward Oakham from the car park. There is one steep hill at Manton, and a few other ups and downs. If you do it from Whitwell, anti-c, the last 5 miles or so are totally flat. Doing the peninsular bit is around 26 miles total, missing out that is 18 or so miles, both are pretty simple TBH, just take it easy. Cafes/pubs/shops at Whitwell, Oakham (half a mile or so away), Manton, Normanton, and a garden centre with cafe on the route too, so lots of places to stop. From what I remember, its been around 2 years since, the peninsular bit didnt have great sign posting, we rode past one marker twice before we were told which way to go. Its a nice ride, if its sunny, expect the car parks to be packed at 12 noon, but, most people dont venture more than 500 metres from the car park, so once away, its quiet.