RE: early season calling
I use a soft contact call (grunt) about every half hour while in stand during the first couple weeks of the season. Does it work? I really don't know, but I do regularly see more deer than my counterparts do in the same woodlots.
I am a long time largemouth bass fisherman, and if I want to catch the fish I have to use a lure. It just seems pointless to sit in the woods and wait for deer to come to you.