It's easy to find deer in Cades Cove - they are all over the place especially at sunrise and sunset. Doe are in groups all over the place but the bucks are with groups of does or solitary now that the rut has started.
While I have only caught far away fast glimpses of male deer sparring with one another, this sight will be more common and easier to find as the rut goes on and becomes more intense.
During the rut male white tail deer herd harems of does for future mating and fight off other bucks - usually without any injury other than their pride.
Deer can be more aggressive so it's a good idea to keep your distance from the deer even though they appear to be very docile. A white tail deer's best weapon is its hooves not it antlers!