RE: what calls to use when?
Get a True Talker or a Flextone there pretty good calls they have insrtuctions on how to use them.
From opening day to the end of Oct. use only fawn or does bleats ( early season ) 3 short blats.
Try to mimick the sound of sheep going bhaaa bhaaa bhaaa but soft and low and call every 1/2 hour or so.
Come the first two weeks of Nov. start with the buck gunts and make it sound like urrrp urrrp urrrp.
As you practice you'll get better, you might want to try some rattling at that time too.
You might want to read some books on the subject, I have one titled The Art of Whitetail Deception by Kathy Etling.
I found it to be very informitive, this book tells you about calling, rattling and decoying it very good reading.