Good luck most people that have Osceolas know it and leasing land is pretty hard for turkey hunting.I dont know about public land butI would guess those birds will be few and far between on wma's because Osceolas only live in sucha small part of the country. But hey if you hunt turkeys you love a challenge anyway, go for it!
As far as where the Easterns stop and the Osceolas begin the NWTF says Live Oak but your gonna run in to hybrids around the line. I got a friend there and that place is full of hybrid turkeys. To get the real thing your gonna have to get a little further south, Alatchua, Gainsville,Orlando,Kissimmee.