I take youths out for the youth season in Iowa and I have learned a few things.

I personally havent had much luck calling. Sure they gobble back but they are flocked up usually in the early season. If you can hear hens yelping try to mimic them. Cut them off. Call louder and more aggressive than they are. Try to piss of the boss hen and get her to come whoop your decoy. I have become pretty good at making hens fighting mad and when they come in any toms will usually follow. Dont call too much though. Whenever the hen talks you answer back with a smartass remark. Be carefull though. I almost smoked a hen that come in in full strut because I got her so worked up but then realized it was indeed a hen. Quite a cool show.

Your best bet is going to be to try to pattern them. Figure out where they like to go to feed and strut in the morning and just be there before they are. I dont think decoys hurt anything. Ive always had hens that come into the dekes but they never had toms with them.

Ive seen turkeys fighting during this season so a jake decoy might work. That being said with the fighting comes subdominant birds that might shy away from a jake decoy. Whether you use one would be predicated on whether there is a big boss tom in the area running everyone else out of town. Just some things I've noticed over the years. Hope this helps.