RE: public ground osceolas??
I've hunted Three lakes and there is birds in that management. You also have lots of hunters as well so you may want to be real early to get in. I believe the gate opens for the first 200 hunters.
There are a number of Outfitters out there, so price around, you may find something in the right bracket for you. If your going to pay money make sure your hunting Osceola's and not highbreads, pay for the real thing...
Good Luck...