Being that your in the northern part of the state, in the colder area, I'm guessing those birds are just starting to bust up and the hens aren't an important part of the gobblers main interest just yet. Use some hen talk, but keep it light, a few yelps, clucks, purrs, and keep it fairly soft. Also give them some gobbler talk, loud raspy yelps, putts, keekees. Mix it up between hen and gobbler talk, that should get their attention.
WI Youth & LTH Mentor
Dodge Co. NWTF