Yes, it's close to the first car park. That is soon after the entrance. Don't go to the main car park; that's miles away and is full of dog walkers.
If you want a guided tour just holler and if I'm free I'll show you the way.
It is a National Trust property. This means you have four choices...
Join NT.
Get there early before the car park warden - approx 8.30 though later in winter.
Pay the car parking fee.
Park outside and have a longish walk in.
Make that five...cadge a lift in with an existing member!!!!