i agree KoBear. i don't usually do drives the first few days, unless the deer aren't moving. but when we do use drives to kill deer we always use the slow walk technique and not the running and clapping. i've shot many deer on drives and they were standing still every time. i don't use a whistle tho i like to use a grunt call, or any call of a native species. it won't spook the deer and they look right at you waitin to get shot