You got it. If theyr're coming through within range there is no need to be call happy.
If you do decide to grab some calls, don't let all the smoke and mirrors confuse you. You basically just need something for rattling, a grunt call, and a doe bleat. Thats all you really need.
Here's an intro to calling sounds.
http://www.hungry-for-hunting.com/ca...iled-deer.html