In case this helps.
The Gardiners and Elizabeth spent the night before they visited Pemberley in Bakewell. They stopped at Pemberley the next day on their way to Lambton. According to current maps, Bakewell and Matlock are about nine miles apart.
Depending on which direction from Bakewell you decide to imagine Pemberley being will determine how much farther or closer Pemberley would be to Matlock. But, anyway, it would seem that a day trip is perfectly feasible.
The Gardiners and Elizabeth spent the night before they visited Pemberley in Bakewell. They stopped at Pemberley the next day on their way to Lambton. According to current maps, Bakewell and Matlock are about nine miles apart.
Depending on which direction from Bakewell you decide to imagine Pemberley being will determine how much farther or closer Pemberley would be to Matlock. But, anyway, it would seem that a day trip is perfectly feasible.