Great question, hope I’m not too late in replying.
If you look at historical success rates, the earlier seasons are by far the best. They’re also the most difficult to draw a tag for because of hunter demand. “B” season is a favorite of mine as you enjoy some of the hallmarks of early season hunting, with a much better chance of drawing a tag during this weekday-only hunt. That said, great hunting can be enjoyed later as well, primarily seasons E & F. In MN, this falls on a secondary gobbling peak, and usually sees the gobblers responding well a little later in the morning when hens go to lay on eggs.
No matter how you stack it, there’s never a bad time to be in the spring turkey woods, but if you’re flexible and have preference points – I’d suggest applying for an earlier season.
An invaluable resource is past DNR Spring Harvest reports found on the MN DNR Turkey Page.
Joel