From the PDNPA website:
Recreation Survey 2008
Hundreds of thousands of people visit the Peak District every year to take part in recreation activities.
The Peak District National Park Authority is running a survey from August 30th to 3rd October 2008 to find out how many people take part in each activity and what else they do when visiting the National Park.
As users of the park it makes sense for us to make sure that they know what we want from the park, so click here to take part in the survey.