A bit of data from the Robert Allerton Park Hunt in Piatt County the results show that the hunt is indeed working to reduce the number of deer within the park and surrounding areas, Reducing DV Accidents and the beenfits to the park also include

Volunteering Deer Hunters;
Between March & September 2007 Sixty Four Allerton Archery Deer Hunters Donated a total of 2,752 hours of their time to Allerton Park.
Using figures from the Independent Sector Website the value of the Allerton Hunters Volunteer effort is estimated at roughly $49,500.00.