Use the search facility on these forums via the Head Heritage site. There have been so many recommendations for Cornwall trips in the past.

And yes, they're all correct - a week isn't long enough, even for a small area like West Penwith!! There is a *lot* to see...

On Dartmoor, Merrivale and Grimspound are sites I'm always blown away by, and both are relatively close to roads with parking space.