Sounds like a plan. How about...
Meet at Donington services.
The services are a bit confusing off the motorway. You leave at 23A if northbound, but 24 if southbound. If southbound there's a short stretch of duel (A453) to the Donington services roundabout. If you're coming to Donington services from the A50 then it's the A50 right to the end following the signs for the M1 and then the same stretch of duel carriageway to the services roundabout.
Leave the services and then a quick blast up the A50 to Jn 2 turning right / north onto the A6.
Turn left / west onto the A52 (Brian Clough Way).
At the roundabout turn right / north onto the A61 (Sir Frank Whittle Road).
Stay on the A61 to Alfreton golf course turning right / east onto the A38.
Travel on the A38 crossing the M1 and then turning left / north onto the B6027.
By this point it's local roads..
Bear left onto Chesterfield road to the T junction turning right onto the B6014.
Turn Left onto Shepherds Lane, which bears tightly to the right to then turn onto Stanley Lane.
Travel north on Stanley Lane turning sharp right onto the drive to Hardwick Hall, being careful over the speed humps.
It will take the best part of an hour, so as MITCAR opens at 10.30am, how about we meet at the services around 9am for a quick coffee and chat aiming to be away for 9.30 - 45am.
Oh and don't forget it's a fiver to get in if you're in an Italian motor.