HuntingGuy, I've hunted area 25 exclusively for 12 years. That's where I live and there's Lots and Lots of Bears.
Handwerk, Unless you are an experienced bear hunter I'd not try calling. If you are hunting with a guide I'd pay attention to what he (she) recommends. I've been lead to believe that using sent to attract bears is very effective, especially when used with eatable bait. Also, a cover sent for yourself isn't a bad idea either. It's more important, I think , to be clean as possible, and wear odor free cloths, and have nothing to snack on when waiting for a bear to come to your stand. Bears can smell out food from miles away, and they can smell out unclean hunters further than that.
By the way, I just received my "MN Bear Patch" from the DNR yesterday. If you were a successful hunter, and sent in the tooth sample, you should be getting your patch this week.