I would normally reference what I am posting with websites but I am doing this from a phone. The MN season is broken into 8 time periods, A-H, starting in mid April and going through late May. The time periods are roughly 5-7 days long. The OTC tags are for season E-H only and as far as I know you can only buy them if the season hasn't started yet. Minnesota is broken into 12 zones, I believe, and you can only hunt in that zone for your specified time period, unless you are bow hunting. Minnesota has a very diverse turkey hunting land varying from the bluffs in southeast MN to the forests north of I-94 to the Minnesota river valley.
Check out the MnDNR website on wild turkey hunting and feel free to let me know if I can help at all.
"Strength does not come from physical capacity. It comes from an indomitable will." --Mahatma Gandhi
"Never confuse a single defeat with a final defeat."--F. Scott Fitzgerald, American writer