Stewing meat with vinegar or adding it after
Probably the turkey legs are frozen right now.  Why don't you experiment on some turkey legs from the store?

Probably acid would be good to help break down tough cuts.  I have not heard of stewing in vinegar but definitely stewing in wine.  I stew in V8 juice pretty often.  If vinegar is what you dig, try stewing some regular turkey legs, with an onion, cinnamon stick + star anise and some navy beans to soak up flavor.  I would pick apple cider vinegar for turkey if you had to use vinegar.  If I were doing it I would use apple cider +/- cheap white wine and save vinegar for a condiment.  Or I have heard of these things "recipes" you might find.

If you like what you make with the farm turkey, then you can try it with your wild turkey. If you screw up farm turkey it will still be edible and you can tweak it for round 2, and round 3, until you get it right.